Benzodiazepines are a group of medicines used for several medical conditions, including anxiety disorders, insomnia, seizures, panic symptoms, and other conditions. Common examples include alprazolam, clonazepam, diazepam, lorazepam, oxazepam, and temazepam.
Benzodiazepine Conversion Calculator
Because benzodiazepines differ substantially in potency, duration of action, metabolism, and clinical effects, comparing doses between different medicines is not as simple as comparing the number of milligrams. A benzodiazepine conversion calculator can provide an approximate comparison by expressing a dose of one benzodiazepine as an estimated diazepam equivalent.
The calculator on this page allows you to select a benzodiazepine, enter the dose in milligrams, and specify how many times the medication is taken each day. It then provides an approximate diazepam equivalent per dose and an estimated daily diazepam equivalent.
However, benzodiazepine equivalence is inherently approximate. Published conversion tables can disagree, and an equivalent dose on paper does not necessarily produce exactly the same clinical effect in an individual person. The 2025 Joint Clinical Practice Guideline on Benzodiazepine Tapering, developed by ASAM and partner organizations, specifically describes dose equivalents as approximate and says clinical decisions should be individualized based on patient response. ASAM Downloads
Important safety information: This calculator is for educational estimation only. It should not be used by itself to start, stop, switch, increase, decrease, or taper a benzodiazepine. Benzodiazepines can cause physical dependence, and abruptly stopping or reducing them too quickly can cause serious withdrawal, including seizures. The FDA recommends gradual, individualized tapering under appropriate clinical supervision when discontinuation is appropriate. U.S. Food and Drug Administration
What Is a Benzodiazepine Conversion Calculator?
A benzodiazepine conversion calculator is a tool that estimates how the dose of one benzodiazepine compares with a reference dose of another benzodiazepine.
For this calculator, diazepam is the reference medication.
The calculator contains approximate reference relationships for:
- Alprazolam (Xanax)
- Bromazepam
- Chlordiazepoxide
- Clonazepam (Klonopin)
- Diazepam (Valium)
- Lorazepam (Ativan)
- Nitrazepam
- Oxazepam
- Temazepam
The calculator uses a reference of 10 mg of diazepam and estimates how much of each selected medication corresponds to that reference.
For example, according to the conversion values built into this particular calculator, 0.5 mg of alprazolam is treated as approximately equivalent to 10 mg of diazepam.
That does not mean that 0.5 mg alprazolam and 10 mg diazepam will necessarily feel identical or produce identical effects in every person. Equivalence tables are clinical estimates rather than exact mathematical conversions.
Why Diazepam Is Used as a Reference
Diazepam is frequently used as a reference point in benzodiazepine equivalence discussions.
Using a common reference makes it possible to express different benzodiazepines using a single comparison scale.
For example, rather than simply comparing:
- 0.5 mg alprazolam
- 1 mg lorazepam
- 0.5 mg clonazepam
- 10 mg diazepam
a conversion framework can express each as an approximate diazepam-equivalent amount.
This can make comparisons easier when discussing medication histories with healthcare professionals.
The 2025 ASAM-led guideline includes a dose-equivalence table based on a 10 mg oral diazepam reference, while also showing that different established sources can provide different equivalent values for some medications. ASAM Downloads
That difference is one of the most important reasons not to treat an online conversion number as an exact prescribing instruction.
Benzodiazepines Included in This Calculator
The calculator includes nine medications.
| Benzodiazepine | Approximate reference used by this calculator | Reference relationship |
|---|---|---|
| Alprazolam | 0.5 mg | 0.5 mg ≈ 10 mg diazepam |
| Bromazepam | 5 mg | 5 mg ≈ 10 mg diazepam |
| Chlordiazepoxide | 25 mg | 25 mg ≈ 10 mg diazepam |
| Clonazepam | 0.5 mg | 0.5 mg ≈ 10 mg diazepam |
| Diazepam | 10 mg | 10 mg ≈ 10 mg diazepam |
| Lorazepam | 1 mg | 1 mg ≈ 10 mg diazepam |
| Nitrazepam | 10 mg | 10 mg ≈ 10 mg diazepam |
| Oxazepam | 20 mg | 20 mg ≈ 10 mg diazepam |
| Temazepam | 20 mg | 20 mg ≈ 10 mg diazepam |
Important: These are the values programmed into this calculator, not universal or exact equivalence standards. The ASAM guideline’s 2025 dose-equivalence table demonstrates why users should check the specific clinical reference being used: for example, it lists different approximate values for alprazolam, clonazepam, lorazepam, oxazepam, and temazepam depending on the reference source. ASAM Downloads
How to Use the Benzodiazepine Conversion Calculator
Using the calculator involves three inputs.
Step 1: Select the Benzodiazepine
Choose the medication from the dropdown list.
Available choices include:
- Alprazolam
- Bromazepam
- Chlordiazepoxide
- Clonazepam
- Diazepam
- Lorazepam
- Nitrazepam
- Oxazepam
- Temazepam
Make sure you select the exact medication you are currently reviewing.
Step 2: Enter the Dose
Enter the dose in milligrams (mg).
For example, if the prescribed dose is 0.5 mg, enter:
0.5
The calculator accepts positive values.
The dose should represent the amount taken per administration, because the calculator separately asks how many doses are taken per day.
Step 3: Enter Doses Per Day
Enter the number of times the medication is taken each day.
For example:
- Once daily = 1
- Twice daily = 2
- Three times daily = 3
- Four times daily = 4
The calculator accepts values from 1 through 24.
This input is important because the daily diazepam equivalent is calculated by multiplying the estimated equivalent per dose by the number of daily doses.
Step 4: Select Calculate
After entering the information, select Calculate.
The calculator displays:
- Medication
- Dose entered
- Approximate diazepam equivalent per dose
- Approximate daily diazepam equivalent
- Approximate equivalent ratio
The result also reminds users that benzodiazepine equivalence estimates are approximate.
Benzodiazepine Conversion Formula
The calculator uses a relatively simple mathematical formula.
Each medication has an approximate reference dose that corresponds to 10 mg of diazepam.
The general formula is:
Diazepam Equivalent = (Entered Dose ÷ Reference Dose) × 10 mg
Here, the reference dose depends on the selected medication.
For example, the calculator uses:
Alprazolam reference dose = 0.5 mg
Therefore, for alprazolam:
Diazepam Equivalent = (Alprazolam Dose ÷ 0.5) × 10
For lorazepam, the calculator uses a 1 mg reference:
Diazepam Equivalent = (Lorazepam Dose ÷ 1) × 10
For oxazepam:
Diazepam Equivalent = (Oxazepam Dose ÷ 20) × 10
This produces the calculator’s estimated diazepam equivalent.
Daily Diazepam Equivalent Formula
Once the calculator determines the approximate equivalent per dose, it calculates the daily equivalent.
The formula is:
Daily Diazepam Equivalent = Equivalent Per Dose × Doses Per Day
For example, if a calculator result shows an estimated equivalent of 10 mg diazepam per dose and the medication is taken twice per day:
10 × 2 = 20 mg/day
Again, this is a mathematical estimate based on the calculator’s reference table. It should not be interpreted as an instruction to take 20 mg of diazepam.
Benzodiazepine Conversion Example
Consider a hypothetical example using lorazepam 1 mg per dose, taken twice daily.
The calculator’s built-in reference is:
1 mg lorazepam ≈ 10 mg diazepam
Step 1: Calculate the equivalent per dose
(1 ÷ 1) × 10 = 10 mg
The approximate diazepam equivalent is therefore:
10 mg diazepam per dose
Step 2: Calculate the daily equivalent
The medication is taken twice daily:
10 × 2 = 20 mg/day
The calculator would therefore display approximately:
- Dose entered: 1.00 mg
- Diazepam equivalent per dose: 10.00 mg
- Daily diazepam equivalent: 20.00 mg/day
This example demonstrates the calculator’s arithmetic only. It does not establish that switching from lorazepam to diazepam at that amount would be clinically appropriate.
Another Example: Alprazolam
Suppose a hypothetical calculation uses:
Alprazolam = 0.5 mg per dose
The calculator’s reference is:
0.5 mg alprazolam ≈ 10 mg diazepam
Therefore:
(0.5 ÷ 0.5) × 10 = 10 mg diazepam
If taken twice daily:
10 × 2 = 20 mg/day
The mathematical result is therefore an approximate:
10 mg diazepam equivalent per dose
and:
20 mg diazepam equivalent per day
The calculation should be viewed as an equivalence estimate, not a direct medication-switching recommendation.
Example Conversion Table
The following table reflects the reference values programmed into this calculator.
| Medication | Calculator Reference Dose | Approx. Diazepam Reference | Example Dose | Calculated Equivalent |
|---|---|---|---|---|
| Alprazolam | 0.5 mg | 10 mg | 0.5 mg | 10 mg |
| Bromazepam | 5 mg | 10 mg | 5 mg | 10 mg |
| Chlordiazepoxide | 25 mg | 10 mg | 25 mg | 10 mg |
| Clonazepam | 0.5 mg | 10 mg | 0.5 mg | 10 mg |
| Diazepam | 10 mg | 10 mg | 10 mg | 10 mg |
| Lorazepam | 1 mg | 10 mg | 1 mg | 10 mg |
| Nitrazepam | 10 mg | 10 mg | 10 mg | 10 mg |
| Oxazepam | 20 mg | 10 mg | 20 mg | 10 mg |
| Temazepam | 20 mg | 10 mg | 20 mg | 10 mg |
These numbers describe the calculator’s programmed mathematical relationships. They should not be interpreted as a universal clinical conversion table.
Why Benzodiazepine Equivalences Are Approximate
One of the most important concepts to understand is that benzodiazepine equivalence is not an exact conversion.
The ASAM dose-equivalence document explicitly describes the values as approximate and provides different values from different published sources. ASAM Downloads
Several factors contribute to this uncertainty.
Potency Differences
Different benzodiazepines have different pharmacological potency. A small number of milligrams of one medication may correspond to a larger number of milligrams of another.
Therefore, comparing milligram amounts directly can be misleading.
Half-Life Differences
Benzodiazepines can have substantially different durations of action.
Diazepam has a long duration of action, while other benzodiazepines may have shorter or intermediate durations.
This matters because two medications with an approximate equivalent potency can behave differently over the course of a day.
Metabolism
Benzodiazepines can be metabolized differently depending on the medication and the individual.
Age, liver function, other medications, and genetic differences can influence drug exposure.
Individual Response
People do not necessarily respond identically to equivalent doses.
A conversion table provides a population-level approximation rather than a personalized prediction.
Why Different Conversion Tables Can Disagree
You may encounter different benzodiazepine conversion values online or in clinical references.
This is not necessarily an error.
The 2025 ASAM guideline provides a useful illustration. Its dose-equivalence table includes both VA/DoD values and values from the Ashton Manual, and some medications have different values between those sources. ASAM Downloads
For example, the guideline lists:
- Alprazolam: 1 mg in one reference versus 0.5 mg in another
- Clonazepam: 1 mg versus 0.5 mg
- Lorazepam: 2 mg versus 1 mg
- Oxazepam: 30 mg versus 20 mg
- Temazepam: 15 mg versus 20 mg
This is an important reason to identify the source and methodology behind any conversion table.
The number generated by one calculator should not automatically override a clinician’s assessment or another established clinical reference.
Diazepam Equivalent Does Not Mean Identical Effect
A diazepam-equivalent number is best understood as a comparison measure.
It does not mean that two medicines will:
- Have exactly the same duration
- Produce identical sedation
- Produce identical anxiety relief
- Have identical withdrawal symptoms
- Have identical interactions
- Have identical onset of action
- Have identical peak concentrations
- Produce identical effects in every patient
For example, a short-acting benzodiazepine and a long-acting benzodiazepine may have a similar estimated equivalence but behave quite differently pharmacokinetically.
This distinction is particularly important when equivalence numbers are being considered for medication changes.
Benzodiazepine Equivalence and Tapering
One common reason people search for a benzodiazepine conversion calculator is to understand medication switching or tapering.
This is an area where additional caution is particularly important.
The FDA states that benzodiazepines should not be stopped suddenly after ongoing use without discussing a gradual reduction plan with a healthcare professional. Abrupt discontinuation or excessively rapid dose reduction can cause serious withdrawal reactions, including seizures. U.S. Food and Drug Administration
The 2025 ASAM-led guideline similarly states that patients taking benzodiazepines for longer than a month generally should not abruptly discontinue them and should instead taper gradually under clinical supervision. Default
Therefore, an equivalence calculator should not be used to independently design a taper.
A healthcare professional may consider many additional factors, including:
- Current medication
- Current dose
- Duration of treatment
- Frequency of administration
- Reason the medication was prescribed
- Previous withdrawal symptoms
- Other medications
- Alcohol or substance use
- Medical conditions
- Age
- Pregnancy status when relevant
- Previous taper attempts
- Individual response
A numerical equivalence is only one piece of information.
Benzodiazepine Dependence and Withdrawal
Physical dependence can occur with benzodiazepine use even when medication is taken as prescribed.
The FDA notes that physical dependence may develop after regular use and that stopping suddenly or reducing the dose too quickly can produce withdrawal reactions. U.S. Food and Drug Administration
Possible withdrawal symptoms can include:
- Anxiety
- Insomnia
- Irritability
- Tremor
- Panic symptoms
- Muscle symptoms
- Perceptual changes
- Cognitive symptoms
Severe withdrawal can include seizures and other serious complications.
For this reason, anyone who is considering stopping or substantially changing a benzodiazepine should discuss the change with an appropriate healthcare professional.
Benzodiazepines and Other Substances
Another important safety consideration is combining benzodiazepines with other central nervous system depressants.
The FDA specifically warns about serious risks when benzodiazepines are combined with opioids, alcohol, or certain other substances. U.S. Food and Drug Administration
This means that an equivalence calculation should never be viewed independently from the rest of a person’s medication and substance-use profile.
A person taking multiple medications should provide their healthcare professional with a complete list of prescription medicines, over-the-counter products, supplements, and substances being used.
Understanding the Calculator’s Results
The calculator provides four main pieces of information.
Medication
This identifies the benzodiazepine selected from the list.
Dose Entered
This is the dose you entered in milligrams.
Approximate Diazepam Equivalent Per Dose
This is the calculator’s estimated equivalent amount of diazepam for one administration.
Approximate Daily Diazepam Equivalent
This multiplies the estimated equivalent per dose by the number of doses entered per day.
Approximate Equivalent Ratio
The calculator also displays a relationship such as:
1 mg lorazepam ≈ 10 mg diazepam
This makes the mathematical basis of the result easier to understand.
How to Interpret a Daily Equivalent
A daily equivalent should not be confused with a recommended daily dose.
Suppose a calculator reports:
20 mg/day diazepam equivalent
That does not mean the person should take 20 mg of diazepam.
It means the entered medication and dosing frequency correspond to approximately 20 mg/day according to the calculator’s selected reference relationship.
The distinction between equivalent estimate and recommended dose is critical.
Factors a Healthcare Professional May Consider
A clinician evaluating benzodiazepine equivalence may consider information that a simple calculator cannot capture.
These factors may include:
| Factor | Why It Matters |
|---|---|
| Medication | Different benzodiazepines have different properties |
| Dose | Determines the starting mathematical comparison |
| Frequency | Affects daily exposure |
| Duration of use | Relevant to physical dependence and withdrawal |
| Half-life | Influences duration of drug exposure |
| Age | Can affect medication handling and adverse effects |
| Liver function | Can affect metabolism of some medicines |
| Other medicines | May alter effects or increase risks |
| Alcohol/substances | Can increase central nervous system depression |
| Treatment indication | The original condition affects clinical decisions |
| Previous withdrawal | May influence future tapering considerations |
| Individual response | Equivalence estimates do not predict every person’s response |
This is why an online calculator cannot replace individualized medical assessment.
When Should You Seek Urgent Medical Help?
Anyone experiencing serious symptoms after taking, changing, or stopping a benzodiazepine should seek appropriate medical attention.
The FDA specifically identifies serious symptoms such as seizures and difficulty breathing as reasons to seek emergency medical care. U.S. Food and Drug Administration
Benzodiazepines can also become particularly dangerous when combined with opioids or alcohol because of increased central nervous system depression and overdose risk. U.S. Food and Drug Administration
If an emergency is occurring, use local emergency services rather than relying on an online calculator or attempting to calculate a medication adjustment.
Benefits and Limitations of a Benzodiazepine Conversion Calculator
Potential Benefits
A conversion calculator can:
- Provide a quick mathematical estimate
- Help explain relative potency concepts
- Make dose-equivalence relationships easier to visualize
- Help users understand why milligram amounts cannot be compared directly
- Provide a starting point for an informed discussion with a healthcare professional
Important Limitations
It cannot:
- Diagnose a medical condition
- Determine the correct dose for an individual
- Design a safe taper
- Predict withdrawal severity
- Guarantee equivalent clinical effects
- Account for every drug interaction
- Replace professional prescribing decisions
The distinction is especially important because official guidance emphasizes individualized clinical decision-making for benzodiazepine tapering and dose changes. Default
Frequently Asked Questions
1. What is a benzodiazepine conversion calculator?
A benzodiazepine conversion calculator estimates the approximate equivalent amount of one benzodiazepine compared with diazepam. This calculator also estimates the daily equivalent based on the number of doses taken per day.
2. Which benzodiazepines are included in this calculator?
The calculator includes alprazolam, bromazepam, chlordiazepoxide, clonazepam, diazepam, lorazepam, nitrazepam, oxazepam, and temazepam.
3. What is the reference dose for diazepam?
The calculator uses 10 mg of diazepam as its reference amount. The other medications are assigned approximate doses corresponding to that reference.
4. Are benzodiazepine conversion calculations exact?
No. Equivalence calculations are approximate. Different published clinical references can provide different equivalent values, and individual response can vary. The ASAM guideline specifically describes benzodiazepine dose equivalents as approximate. ASAM Downloads
5. Can I use the calculator to switch benzodiazepines?
The calculator can help explain an approximate equivalence, but it should not be used independently to switch medications. A medication change should be planned with a qualified healthcare professional.
6. Can I use the calculator to create a benzodiazepine taper?
No. The calculator is not a tapering tool. Benzodiazepine tapering should be individualized and medically supervised when appropriate. FDA guidance warns that abrupt discontinuation or overly rapid reduction can cause serious withdrawal, including seizures. U.S. Food and Drug Administration
7. Why might another calculator give a different result?
Different equivalence references use different estimates. The 2025 ASAM guideline shows that established sources can disagree on the approximate equivalent dose for several benzodiazepines. ASAM Downloads
8. What does the daily diazepam equivalent mean?
It is the calculator’s estimated diazepam equivalent for the total number of doses taken during one day. It is not a recommended diazepam dose.
9. Does an equivalent dose produce the same effects?
Not necessarily. Benzodiazepines differ in duration, metabolism, onset, potency, and other pharmacological characteristics. An equivalence estimate should therefore not be interpreted as guaranteeing identical effects.
10. Can benzodiazepines be stopped suddenly?
People who have been taking benzodiazepines regularly should not assume it is safe to stop suddenly. The FDA warns that abrupt discontinuation or rapid dose reduction can cause serious withdrawal, including seizures, and recommends individualized gradual reduction when discontinuation is appropriate. U.S. Food and Drug Administration
Final Thoughts
A Benzodiazepine Conversion Calculator can be useful for understanding how commonly used benzodiazepine doses are approximately compared with a diazepam reference dose. This calculator uses a 10 mg diazepam reference and provides estimates for alprazolam, bromazepam, chlordiazepoxide, clonazepam, diazepam, lorazepam, nitrazepam, oxazepam, and temazepam.
The basic calculation is:
Diazepam Equivalent = (Entered Dose ÷ Reference Dose) × 10
The estimated daily equivalent is then:
Daily Equivalent = Equivalent Per Dose × Doses Per Day
These formulas make the mathematical process straightforward, but the clinical interpretation is much more complicated.
Published benzodiazepine equivalence tables can differ, and the 2025 ASAM guideline explicitly describes these values as approximate. ASAM Downloads Consequently, an online conversion should be treated as an educational estimate rather than an exact pharmacological conversion.
Most importantly, the calculator should not be used to independently determine a medication switch, dose adjustment, or tapering schedule. Benzodiazepines can cause physical dependence, and the FDA warns that abrupt discontinuation or overly rapid dose reduction can result in serious withdrawal reactions, including seizures. U.S. Food and Drug Administration
For anyone considering changing a benzodiazepine regimen, the safest approach is to use the calculator, if at all, as an informational reference for discussion with a qualified healthcare professional, rather than as a substitute for individualized medical guidance.