Supplement Bottle Supply Calculator: How Long Will It Last?
Enter the information printed on your bottle. The calculator will estimate how many complete days it will last, the date you will finish it and when you may want to reorder.
Your supplement supply
Example: A bottle containing 120 capsules, taken as two capsules once daily, provides 60 complete days of use.
This calculator works out supply length only. It does not recommend a dose. Always follow the product label or advice from a qualified healthcare professional.
A supplement label might say that a bottle contains 60 tablets, 90 gummies or 180 capsules. That sounds straightforward until the serving instructions tell you to take two capsules twice daily. How long will the bottle actually last?
The Supplement Bottle Supply Calculator above works this out for you. It can calculate the supply length of capsules, tablets, gummies, softgels, powder scoops, sachets and liquid drops. It also estimates your finish date, an optional reorder date and how much the product costs per day.
This can be helpful when comparing supplement prices. A large bottle is not necessarily better value if its suggested serving requires several capsules each day.
How to calculate how long a supplement bottle will last
The basic calculation is:
Total quantity divided by daily use equals days of supply
Imagine a bottle contains 120 capsules and the label says to take two capsules once per day:
- Total quantity: 120 capsules
- Capsules per dose: 2
- Doses per day: 1
- Daily use: 2 capsules
- Supply length: 60 days
If the instructions instead say two capsules twice daily, the daily use rises to four capsules. The same bottle then provides only 30 complete days.
Why the serving size matters
The largest number printed on the front of a supplement bottle is not always the amount contained in one capsule. It may describe the quantity delivered by a complete serving consisting of two, three or four capsules.
Before using the calculator, look for:
- The total number of capsules, tablets or servings
- The number required for one dose
- The number of doses taken each day
For example, “90 capsules” and “30 servings” can both be accurate when a serving consists of three capsules.
How to use the supplement supply calculator
- Select the type of supplement.
- Enter the total quantity in the container.
- Enter the number used for each dose.
- Enter how many doses are taken each day.
- Select how much of the bottle remains.
- Choose the date you will begin or continue using it.
- Add the price if you want to calculate the daily cost.
- Choose how much warning you want before reordering.
The result shows complete days of use. If there is enough left for an additional dose but not a complete day, the calculator identifies this separately.
How long will 120 capsules last?
The answer depends on the instructions:
- One capsule daily lasts 120 days.
- Two capsules daily last 60 days.
- Three capsules daily last 40 days.
- Four capsules daily last 30 days.
This is why it is important to compare daily servings rather than bottle size alone.
Common supplement supply examples
| Bottle quantity | Daily use | Supply length |
|---|---|---|
| 60 capsules | 1 per day | 60 days |
| 60 capsules | 2 per day | 30 days |
| 90 capsules | 3 per day | 30 days |
| 120 capsules | 2 per day | 60 days |
| 180 capsules | 3 per day | 60 days |
How long will 60 gummies last?
A container of 60 gummies lasts 60 days if the serving is one gummy daily. It lasts 30 days if the serving is two gummies daily and 20 days if the serving is three gummies daily.
Check whether the label describes one gummy or a complete multi-gummy serving. The nutrient amounts displayed on the label may apply to the whole serving rather than each individual gummy.
Calculating powders and liquid supplements
Powder and liquid products can be harder to calculate because the container may show its total weight or volume rather than the number of servings.
If the label states “30 servings”, select Other servings, enter 30 as the total quantity and enter one serving per dose.
If it contains 60 measured scoops and you use one scoop daily, enter 60 as the quantity. If you use half a scoop daily, enter 0.5 as the amount per dose.
For liquid supplements, use the total number of drops provided by the manufacturer if available. Estimates based only on bottle volume may be inaccurate because drop size and dispensers vary.
Comparing the true cost of supplements
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