MME Calculator - Daily MME Tally & Threshold Flag

The MME calculator is a clinical decision support tool that converts a patient's daily opioid dose into morphine milligram equivalents (MME) per day using the CDC 2022 conversion factors. It is built for clinicians, pharmacists, nurses, and patients who want a quick tally that flags when a regimen crosses the 50 MME per day reassessment threshold or the 100 MME per day high-dose band.

• • Pre-visit opioid review: Tally the combined daily MME for every opioid on a medication list before a chronic-pain follow-up so the team can speak in one number.
• • Switching or rotating opioids: Compare the daily MME of the current opioid with the candidate opioid's reference dose before suggesting an opioid rotation.
• • Naloxone and risk-mitigation planning: Use the threshold band to decide when the CDC 2022 guideline suggests offering naloxone and tightening follow-up.
• • Patient and caregiver education: Show a patient how a dose in milligrams of one drug compares with a different opioid in MME to support shared decision-making.

MME is a translation, not a potency ranking. It lets a clinician say that 30 mg of oral oxycodone per day is roughly equivalent to 60 mg of oral morphine per day, and carry that number across notes, refill requests, and risk reviews. The CDC 2022 guideline uses MME for two specific clinical decisions: when to pause and reassess before further dose escalation, and when to consider naloxone and tighter follow-up.

Tramadol is a step-1 opioid with a low CDC factor, and the Tramadol Dosage Calculator can be used to check whether a tramadol schedule is still within the label limits before adding up the MME.

The calculator takes a single opioid, its dose per administration, and the number of doses per day, applies the CDC 2022 conversion factor for that drug, and returns the total daily MME plus a threshold band. Transdermal fentanyl uses the patch release rate in micrograms per hour, and methadone uses dose-tiered factors (4, 8, 10, 12) because its relationship to morphine is non-linear.

• Opioid drug: The drug the patient is taking. The conversion factor and the unit of the dose entry (mg, mcg, or mcg/hr) are keyed to this selection.
• Dose per administration (mg): Strength of one dose. Used for every oral and sublingual option; most immediate-release tablets fall in the 2.5 to 30 mg range.
• Doses per day: Number of administrations in 24 hours, multiplied by the single dose to get the daily opioid exposure.
• Fentanyl patch release rate (mcg/hr): Used only for the transdermal fentanyl option. Common strengths are 12, 25, 37.5, 50, 75, and 100 mcg/hr; the calculator multiplies by 2.4 to get MME per day.
• CDC 2022 conversion factor: A per-drug multiplier that turns a daily opioid dose into morphine equivalents. Methadone uses a tiered factor that increases with daily dose.

The factor table comes from the CDC 2022 guideline. The CDC treats oral morphine as the reference drug, so morphine itself gets a factor of 1.0. Hydromorphone (4) and oxymorphone (3) get higher factors; tramadol (0.1) and codeine (0.15) get lower factors. The CDC notes that these factors are for aggregate risk assessment, not for direct opioid-to-opioid conversion in a single patient.

According to CDC 2022 Clinical Practice Guideline (MMWR), clinicians should pause and reassess evidence of benefits and risks before increasing total opioid dosage to 50 MME per day or more, and additional increases are progressively more likely to yield diminishing returns in benefits relative to risks.

When an MME review turns up gabapentinoids on the same medication list, the Gabapentin Dosage Calculator supports a parallel check of the gabapentin schedule.

Four terms frame how the MME calculator result should be read at the bedside or in the chart.

According to Omni Calculator MME Reference, oral morphine is assigned a factor of 1, oral oxycodone 1.5, oral hydromorphone 4, oral oxymorphone 3, oral codeine 0.15, oral tramadol 0.1, and oral tapentadol 0.4, which matches the calculator's default table for non-tiered drugs.

For acute pain where the team wants to taper the opioid and add an NSAID, the Ibuprofen Dosage Calculator is the matching worksheet.

Five steps get you from a medication list line to a daily MME total and a CDC threshold band.

1. 1 Pick the opioid drug: Choose the medication you are reviewing from the dropdown. The conversion factor and the unit of the dose entry update with the drug.
2. 2 Enter the single dose in mg: Type the milligram amount of one administration, for example 5 for a 5 mg oxycodone tablet.
3. 3 Enter the doses per day: Type how many times in 24 hours the patient takes that dose. Daily opioid dose = single dose x count.
4. 4 For transdermal fentanyl, enter mcg/hr instead: Select the transdermal option and enter the patch release rate. The single dose and doses per day fields are not used.
5. 5 Read the total daily MME and threshold band: The result panel shows the daily opioid dose, the per-drug MME, and the total MME per day, plus the threshold band and a one-line note.

A 68-year-old on hydrocodone 10 mg four times a day after surgery is a useful example. Select Hydrocodone, single dose 10, doses per day 4, and the calculator returns 40 mg/day and 40 MME per day with a below-threshold band. The same MME could be reached on 5 mg of oxycodone four times a day (45 MME) or a 20 mcg/hr fentanyl patch (48 MME), so the same pain plan can look very different in MME.

If the MME review is part of a multimodal plan, the Paracetamol Dosage Calculator can document the acetaminophen side of the regimen.

A daily MME tally helps with a small set of recurring clinical and educational decisions.

• • One number for the chart: Convert oxycodone, hydromorphone, methadone, and fentanyl doses into a single daily MME that fits in a problem list or discharge summary.
• • Threshold-driven safety flags: The result panel applies the CDC 50 and 100 MME per day bands, so the user sees the reassessment and naloxone guidance without having to look it up.
• • Reference for opioid rotation: Use the calculator when discussing a switch from one opioid to another, so the team can frame the proposed change in MME before the patient starts a new regimen.
• • Teaching aid for trainees: Resident and student conversations move faster when there is a single reference value to discuss, rather than separate mg/day numbers for each drug.
• • Documentation for risk reviews: The total and the threshold band support notes about naloxone and follow-up cadence without storing the math in a separate worksheet.

For regimens that combine an opioid with acetaminophen, the Tylenol Overdose Calculator provides the toxicity check on the acetaminophen component.

Several inputs change the MME result, and a few real-world factors change what the number means in practice.

• • MME is an aggregate risk index, not a dose-equivalence rule. The CDC 2022 guideline explicitly says the factors should not be used to convert one opioid to another for an individual patient.
• • The calculator handles one opioid at a time. For patients on more than one opioid, the totals must be added manually before applying the threshold band.
• • Buprenorphine's partial-agonist ceiling effect is not captured by the 10 MME per mg factor. The CDC 2022 factor is used for aggregate risk only, and the calculator does not score analgesia or respiratory depression curves.

According to CDC Overdose Prevention, patients taking 50 MME per day or more are at increased risk for overdose, which is why clinicians should consider increased follow-up frequency and offer naloxone at that dose.

Because sedating antihistamines compound opioid-related respiratory risk, the Benadryl Dosage Usage Calculator helps document the non-opioid sedative load.