Best Taper Calculators and Planning Tools Compared

The best taper calculator is a hyperbolic one: it cuts a fixed percentage of your current dose instead of a fixed number of milligrams, so the reductions get smaller as you get lower. Our free Taper Plan does that for more than 60 medications. The Maudsley Deprescribing Guidelines are the better choice if you want published, peer-reviewed tables you can hand to a prescriber.

That distinction matters more than any interface. A calculator that subtracts the same milligram amount every step feels steady on paper and gets brutal at the bottom, because the last few milligrams do far more work in your brain than the first few. This article compares the five tools people actually use, says plainly what each one is good and bad at, and tells you which to pick for your situation.

What a taper calculator is and what it cannot do

A taper calculator is a tool that converts your current dose, your reduction size, and your hold time into a step by step schedule for coming off a medication. The good ones work in percentages. The weak ones work in milligrams.

The reason is receptor occupancy. In a 2019 Lancet Psychiatry paper, Horowitz and Taylor showed that serotonin transporter occupancy follows a hyperbolic curve, not a straight line. Going from 20 mg to 15 mg of an SSRI barely changes occupancy. Going from 5 mg to 0 changes it enormously. A milligram based schedule hides that. A percentage based calculator accounts for it automatically, because 10% of a small dose is a small cut.

No calculator knows your nervous system. It cannot tell you whether 10% every 4 weeks is too fast for you, whether you need to hold for 8 weeks after a rough step, or whether what you are feeling is withdrawal or something else. Davies and Read's 2019 systematic review found that withdrawal affects roughly half of people who stop antidepressants, and that duration varies from days to many months across individuals. That spread is exactly the part a calculator cannot predict.

Treat any schedule a tool produces as a starting hypothesis you adjust from real symptom data, not a prescription.

Bottom line: a taper calculator gets the shape of the curve right so you can spend your attention on how your body responds.

Taper calculators and planning tools compared

Each of these is a real tool people use. None of them is a medical decision, and the differences between them are mostly about cost, evidence backing, and how much work you do yourself.

Tool	What it produces	Cost	Best for
taper.community Taper Plan	Percentage based schedule plus an occupancy curve for 60 plus drugs	Free, no account	Getting a realistic timeline fast, and seeing why the last stretch is the hard part
Maudsley Deprescribing Guidelines	Published hyperbolic tables, drug by drug, with clinical rationale	Paid book	Bringing citable evidence to a skeptical prescriber
Tapering strips	Physical pouches of pre measured daily doses in a descending series	Paid, prescription needed	People who cannot make accurate small doses at home
Surviving Antidepressants method	The 10% rule applied by hand, with forum help from long term members	Free	Slow, cautious tapers with peer support through bad patches
Your own spreadsheet	Whatever you build	Free	People who want full control and already understand the math

Bottom line: the free options differ mainly in how much of the arithmetic and judgment you carry yourself.

The taper.community Taper Plan: strengths and honest limits

The Taper Plan visualizer asks for four things: your medication, your starting dose, the percentage you want to cut per step, and how long you hold each dose. It then draws the whole descent, estimates the total duration, and shows the receptor occupancy curve underneath the milligram curve.

What it does well is make the bottom of the taper visible before you get there. Enter a common starting dose of Zoloft at a 10% step and the tool shows roughly 35 steps to get near zero, which at a 4 week hold is about 2 years and 8 months. People find that number shocking. It is also the honest answer, and knowing it at the start prevents the far worse outcome of crashing at month 6 and having to reinstate.

It covers more than 60 medications, including Lexapro, Effexor, antipsychotics, benzodiazepines, and stimulants, so most people find their drug.

The honest downsides: the tool does not tell you how to make the doses. It will happily show a step that requires a liquid formulation or a compounding pharmacy without saying so. It has no dosage form guidance built in, it does not adapt the schedule when you report symptoms, and it assumes you will hold the same interval throughout, which almost nobody actually does. It is a planning instrument, not a companion through the taper.

Bottom line: the Taper Plan is the fastest way to get a realistic hyperbolic schedule and timeline for free, and it stops at the point where practical dosing questions begin.

The Maudsley Deprescribing Guidelines: strengths and honest limits

The Maudsley Deprescribing Guidelines, written by Mark Horowitz and David Taylor, are the first mainstream clinical reference to publish hyperbolic taper schedules drug by drug. For each medication they give the pharmacology, the occupancy data, and worked schedules at several speeds.

The strength is authority. When a prescriber says a 4 week taper is standard, a published clinical guideline carries weight that a website does not. This matters, because NICE guideline NG215 on medicines associated with dependence or withdrawal now tells UK prescribers to taper slowly, at a rate the patient can tolerate, and to use smaller reductions at lower doses. Pairing that guideline with the Maudsley tables gives you a clinical argument rather than an opinion.

The honest downsides: it is a paid book aimed at clinicians, the language is technical, and it is static. You cannot enter your own numbers and see your own curve. If your dose or your desired speed is not one of the worked examples, you are back to doing the arithmetic yourself.

Bottom line: the Maudsley guidelines are the best taper calculator to cite, and a website is the best one to actually use.

Tapering strips and the dosing problem no calculator solves

Every percentage based schedule eventually asks for a dose that does not exist as a tablet. Tapering strips, developed in the Netherlands and described at taperingstrip.org, address that directly: a pharmacy supplies a roll of daily pouches, each containing a slightly lower pre measured dose, so you never have to cut or weigh anything.

The strength is accuracy and simplicity at the low end, which is exactly where people fail. Removing the daily task of measuring a tiny dose removes a real source of error and anxiety.

The honest downsides: cost and access. Strips require a prescription, availability outside the Netherlands and a handful of other countries is limited, and insurance coverage is inconsistent. The pre set descent is also fixed once dispensed, so adjusting mid strip because a step went badly is awkward. For most readers this is a good option that is not currently available to them.

Bottom line: tapering strips solve the physical dosing problem better than any software, when you can get them.

I found a taper calculator that says I can be off in 8 weeks. Is that one wrong?

Probably, if it is subtracting equal milligram amounts. An 8 week schedule off a standard antidepressant dose means large proportional cuts near the end, which is where withdrawal concentrates.

Short taper templates persist because they come from the original registration trials, which were designed to test whether a drug worked, not how to stop it. Deprescribing.org's guideline algorithms and NICE both now recommend flexible, symptom led reductions instead. The clinical literature moved; most clinic handouts have not.

A useful test for any calculator: enter a small dose and see what it suggests. If the step size stays the same in milligrams as the dose falls, the tool is linear and will get harder exactly when you have least capacity to cope. If the milligram step shrinks as the dose shrinks, the tool is hyperbolic. That single check separates the tools worth using from the rest.

Bottom line: judge a taper calculator by what it does at 2 mg, not at 20 mg.

What a percentage based taper looks like without milligrams

Because everyone's starting dose differs, the honest way to show a taper pattern is as a percentage of where you started. At a 10% reduction of the current dose each step, the pattern is the same for every drug and every dose.

Step number	Percentage of your starting dose remaining
Step 1	90%
Step 3	73%
Step 5	59%
Step 10	35%
Step 20	12%
Step 30	4%

Notice that the first 10 steps remove about two thirds of the dose and the last 20 steps remove the rest. That shape is the entire argument for hyperbolic tapering, and it is why halfway through the schedule you are nowhere near halfway through the difficulty.

Whether 10% is right for you is a separate question. Long term members at Surviving Antidepressants often reduce more slowly than that after a rough step, and the site's founder Adele Framer, in her account of helping thousands of people taper off psychiatric drugs, describes holding at a dose as the most underused tool available.

Bottom line: percentages transfer between drugs and doses; milligram tables do not.

Choose the taper calculator that fits your situation

Choose the Taper Plan visualizer if you want a realistic schedule and timeline in a few minutes, for free, and you want to see the occupancy curve that explains why the end is harder than the start.

Choose the Maudsley Deprescribing Guidelines if your obstacle is your prescriber rather than the math, and you need a citable clinical source. Our guide to finding a deprescribing-informed clinician helps with the same problem from the other direction.

Choose tapering strips if you have access to them and the practical difficulty of making accurate small doses is what is stopping you.

Choose your own spreadsheet if you have an unusual formulation, a combined taper, or a prescriber who wants something specific, and you are comfortable with the arithmetic. Our worksheet for building a tapering plan and the walkthrough on how to calculate a taper schedule both cover the math step by step.

Whichever you choose, pair it with symptom tracking. A schedule tells you what you planned; a log tells you what happened. Our symptom and dose journal records both so the next decision is based on your own data rather than memory.

Bottom line: pick the tool that solves your specific obstacle, which is usually evidence, arithmetic, or physical dosing.

Frequently asked questions

What is the best free taper calculator?

The taper.community Taper Plan is the strongest free option, because it is hyperbolic, covers more than 60 medications, requires no account, and shows the receptor occupancy curve alongside the dose curve. The free alternative is applying the 10% rule by hand with a spreadsheet, which gives the same schedule but no visualization and more chances for an arithmetic error.

I have been on Effexor for 6 years and my doctor says to just take it every other day. Should I use a calculator instead?

Yes. Alternate day dosing is not a taper, it is a repeated series of abrupt reductions, and it is particularly poor for short half life drugs like venlafaxine, where blood levels drop sharply between doses. A percentage based schedule holds the level steady and lowers it gradually instead. NICE guidance now advises against reductions the patient cannot tolerate, which gives you something concrete to bring to the appointment.

How accurate are taper calculators?

The arithmetic is exact and the biology is an estimate. Occupancy curves come from population averages, so your individual response can differ substantially. Use the calculated schedule as a starting plan, then slow down or extend holds based on symptoms rather than treating the output as fixed.

Can a taper calculator tell me how to split doses that small?

No, and this is the main gap in every software tool. Making accurate small doses usually means a liquid formulation, a compounded preparation, or a pharmacist's help. Bring the schedule to a pharmacist and ask what forms exist for your drug before you commit to the last third of the plan.

Is it safe to follow a taper calculator without a doctor?

Tapering is safer with clinical support, particularly for benzodiazepines, antipsychotics, and mood stabilizers, where abrupt or fast reductions carry specific risks. Many people do not have a prescriber willing to supervise a slow taper, which is why these tools exist. If you are proceeding without support, go slower than the calculator suggests, keep a written log, and get medical help promptly for severe symptoms.

Start with a schedule you can actually finish

The best taper calculator is whichever one shows you a realistic curve and an honest timeline before you take the first step down. A tool that promises 8 weeks is not being kind to you, it is being wrong. A tool that shows 2 years and lets you plan around it is doing its job.

taper.community is a free resource and peer forum for people coming off psychiatric medication, built around hyperbolic tapering and slow, proportional dose reductions. Run your numbers through the Taper Plan, read the background in our education library, and bring your questions to the forums, where people at every stage of a taper compare notes about what actually worked.

Medical disclaimer: This article is for information only and is not medical advice. Never change a psychiatric medication dose without discussing it with a qualified prescriber. Stopping medication abruptly can be dangerous. If you experience severe symptoms during a taper, seek medical help promptly.