Compare the cost

Supplement cost per serving calculator

Turn the bottle price into a cost per serving, a 30-day budget and the number of days it will last.

Your numbers

CurrencyUse this currency for all prices. No exchange conversion.

Package priceUse the final price, including any delivery cost.Servings per containerRead servings per container, which may differ from the capsule count.Servings used per dayEnter your existing plan or label directions; this tool does not choose a dose.

Results update as you type. No account needed.

The result

Cost per serving

$0.40

Days of supply: 60 days
Cost per day: $0.40
Cost per 30 days: $12.00

This is budgeting arithmetic. Different brands may define a serving differently. A 30-day cost is prorated; buying whole bottles can require more cash upfront.

How the calculation works

Cost per serving = price ÷ servings; days of supply = servings ÷ daily use

A worked example

A $24 bottle with 60 servings costs $0.40 per serving. At two servings per day it lasts 30 days and costs $24 per 30 days.

Capsules are not always servings

If a bottle contains 120 capsules and the label defines a serving as two capsules, enter 60 servings. At one such serving per day, the bottle lasts 60 days. Entering 120 would halve the reported cost incorrectly.

Common questions

How do I calculate supplement cost per month?

Divide the package price by its servings, then multiply by daily servings and 30. This tool uses a fixed 30-day month to make comparisons consistent.

Does a lower cost per serving mean better value?

Only if the serving amounts and ingredients are comparable. For protein, use the protein cost calculator; for fish oil, compare EPA plus DHA.

Method: arithmetic from the label values you enter. Reviewed 6 September 2026.