Creatine Supply Calculator

Simple numbers. Clearer choices.

Creatine Supply Calculator

See how many complete days your tub covers, what remains, the cost of your chosen daily amount, and the first date you will need more.

The editable values below are an arithmetic example. Replace them with your product label and your own chosen amounts.

Choose the currency of the price you enter. No currency conversion is performed.
Enter the price of the full tub, including any costs you want to include. Up to 2 decimal places.
Use the product’s net weight. Enter the same product weight basis as your daily amount.
Enter your own amount. The example is for arithmetic only, not dosage advice. Up to 3 decimal places.
The start date counts as day 1. Use a calendar date from 1900 onward.

Know what your tub covers

This is a stock and cost calculator. It estimates supply for the fixed daily amount you enter; it does not choose a dose or suggest starting creatine.

Complete days = whole-number part of (tub grams ÷ daily grams).
Remaining product = tub grams − (complete days × daily grams).
Daily cost = tub price × daily grams ÷ tub grams.
30-day cost = daily cost × 30.

  • The first date you cannot take a full chosen amount from this tub is the start date plus the number of complete days. Arrange replacement before that day if you intend to continue. If there is a remainder, it is less than one full chosen amount.
  • Example: a 500 g tub at 5 g per day gives 100 complete days and no remainder. At USD 25 per tub, the daily cost is USD 0.25 and the 30-day equivalent is USD 7.50.
  • Both gram entries must refer to the same product. For blends, do not divide total powder weight by grams of active creatine; use grams of the whole product consistently.
  • Assumes one fixed total amount every calendar day, with no loading phase, missed days, spills, expiry, or scoop-weight variation. It does not recommend taking the partial remainder.
  • Cost estimates are proportional usage costs, not the checkout cost of whole tubs. For practical date display, calculated supply is limited to 36,525 complete days; input bounds are calculation limits, not safe-intake limits.

Choose your amount with appropriate advice

This tool is not medical or dosage advice. NIH reports that creatine can cause weight gain from water retention; gastrointestinal symptoms have also been reported. Supplements may interact with medicines. Speak with a qualified health professional about whether a supplement is appropriate for you.

Health information: NIH Office of Dietary Supplements: Exercise and Athletic Performance (creatine and safety sections; checked October 15, 2026). Supply and price results come from the arithmetic above.

Calculations run in your browser. This calculator does not save entries or send them to a server.