Price per pouch vs cost per serving: how to compare supplement value

The short answer: calculate supplement cost per serving by dividing the complete current price by the number of directed servings in the package. Use the price the customer must actually pay, include unavoidable charges, and make sure the serving definitions are comparable. The result measures price per use, not quality, suitability or effectiveness.

Reviewed 9 August 2026. This guide carries no live prices on purpose, because a price frozen into an evergreen page is wrong within a month. Use the current figures on each product page.

Why pouch price can mislead

Two pouches can have similar dimensions or powder weights while providing different numbers of directed servings. One may require a 5 g serving and another a 10 g serving. A lower headline price can therefore produce a higher cost each time the product is used as directed.

Price comparison also becomes distorted when one figure is a subscription price, another is a one-off price, or unavoidable delivery appears only late in checkout. Record each basis before calculating.

The basic formula

Cost per serving = complete price paid / number of directed servings

Use the product's own directed serving. Do not increase the serving count by inventing half portions or assuming the scoop should be underfilled. If a range is genuinely stated, calculate each labelled option separately and preserve the maximum daily direction.

Worked fictional examples

Example Complete price Directed servings Calculation Cost per serving
Fictional Product A £24.00 20 £24.00 / 20 £1.20
Fictional Product B £30.00 30 £30.00 / 30 £1.00
Fictional Product C with unavoidable £3 delivery £25.00 + £3.00 25 £28.00 / 25 £1.12

Product B has the highest pouch price in this fictional example but the lowest cost per serving. The calculation does not tell you whether its formula, directions or warnings suit you.

Normalise the serving before comparing

Write down these fields for each product:

  • net powder weight;
  • grams and scoops per directed serving;
  • directed servings per package;
  • recommended or maximum daily frequency;
  • important nutrient or ingredient amounts per serving.

A price per 100 g calculation can help compare powder quantity, but it does not replace cost per directed serving. It also does not make formulas nutritionally equivalent. A gram of flavouring, fibre or an amino acid is not interchangeable with a gram of elemental magnesium.

Use the complete current price

Prices should be clear, complete and accurate. For your worksheet, include unavoidable charges known at the point of comparison. If delivery varies by location or basket size, record the assumption rather than presenting one total as universal.

Keep these prices separate:

  • One-off purchase: the normal current product price and applicable unavoidable delivery.
  • Subscription: the current recurring price, delivery, frequency and minimum commitment.
  • Introductory offer: the first price and the price that follows it.
  • Multi-pack: the total price divided by total directed servings across every included pack.

Do not treat a promotional code as the evergreen price unless every eligible customer receives it automatically. Record the comparison date because offers change.

Calculate monthly routine cost carefully

When a product is directed once daily, a 30-day fictional estimate can be calculated as:

Estimated 30-day cost = cost per directed serving x 30

If the label does not direct daily use, do not force the product into a daily estimate. If your actual use differs, keep that personal budget estimate separate from the standardised product comparison.

Check subscriptions before calling them better value

A recurring discount can reduce cost per serving, but the headline percentage is not the whole decision. Check:

  • billing and delivery frequency;
  • whether the introductory and renewal prices differ;
  • how to skip, pause or cancel;
  • minimum commitments or deadlines;
  • delivery charges and supported locations;
  • what happens to unused product.

Only compare a subscription with another subscription when both calculations use their current recurring terms. Also show the one-off calculation so shoppers can choose without assuming recurring delivery is required.

Read returns terms in context

Returns can affect practical value, especially for consumable products, but they should not be reduced to a yes or no badge. Check the live policy for eligibility, time limits, product condition, exclusions, return delivery and how refunds are handled.

Do not promise that an opened supplement can be returned unless the current policy says so. A generous policy can reduce purchasing uncertainty, but it does not prove product quality or an outcome.

A reusable supplement value worksheet

Field Product A Product B
Review date and live URL
One-off product price
Unavoidable delivery used in calculation
Directed serving in grams and scoops
Directed servings per pack
Complete one-off cost per serving
Recurring price and frequency, if applicable
Recurring cost per serving
Returns and cancellation pages checked
Formula and suitability fit

How to assess Hour Seven's current value

Use the live Hour Seven product page for the current price, serving count, purchase options, formula and directions. Divide the applicable complete price by the current number of directed servings. Do not copy a price from this guide because commercial terms can change.

Then assess non-price fit: the complete ingredients, stated amounts, warnings, preparation and whether a drink format suits your routine. If you would rather see the non-price arithmetic already done across several UK products, the comparison of UK magnesium sleep drinks sets out what each one puts in a serving, and it leaves prices out for the same reason this guide does. The guide to magnesium drinks vs capsules separates practical format differences from unsupported efficacy claims.

For current source-led guides, visit the Learning Hub. Always use the live checkout and policy links for location-specific delivery and current terms.

Frequently asked questions

Should I divide pouch price by pouch weight?

That produces a price per gram, which can be useful for one narrow comparison. Cost per directed serving is usually more practical for routine budgeting. Neither figure proves formula quality.

Is the cheapest cost per serving the best value?

Not automatically. Price is one part of value. Also consider formula disclosure, directions, suitability, format fit, support and current terms. Lower price does not establish better efficacy.

Can I count half servings to make the cost look lower?

Only calculate a smaller serving when the label genuinely directs or permits it. Do not invent a serving or exceed the maximum daily direction.

Should delivery be included?

Include unavoidable charges that apply to the comparison. If delivery depends on location, basket or threshold, state the assumption and avoid presenting it as universal.

How often should a published comparison be refreshed?

Check prices, serving counts, subscriptions, delivery and policy links immediately before publication, then on a scheduled basis and whenever a product or offer changes. Show a reviewed date.

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The drink behind the guides

One scoop, 200mg of magnesium as bisglycinate, no melatonin

If you want to try it, everything is below. Free UK delivery, a sleep mask with your first subscription delivery, and a money-back trial of up to 60 days.

4.7 / 5 from 144 verified reviews . Jump to customer reviews

Hour Seven™ Magnesium Sleep Drink

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“I used to wake around 3am and immediately start clock-watching.”
Margaret, a verified Hour Seven customer Margaret, Verified Buyer

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I fall asleep fine. It is staying asleep that I struggle with.

That is exactly what Hour Seven is built around. Most sleep products are aimed at the first thirty minutes of the night.

This one is made for the whole night. It is a magnesium drink taken at the same time every evening. Magnesium contributes to normal functioning of the nervous system and to the reduction of tiredness and fatigue.

I have tried magnesium before and felt nothing.

Check which type of magnesium you took. Most supermarket tablets use magnesium oxide, and comparatively little of it is absorbed. Chalky tablets are also easy to give up on.

Your body cannot make magnesium, so all of it has to come from what you eat. British men average 91% of the recommended intake and women 80%, and around one in eight adults falls below the level considered adequate at all, according to the National Diet and Nutrition Survey. Magnesium contributes to normal functioning of the nervous system and to the reduction of tiredness and fatigue.

Hour Seven uses 200mg of magnesium as bisglycinate. That is magnesium bound to glycine, which is gentler on the stomach and easier to keep taking as a drink. The type is printed on the back of every pack.

How many nights before I notice anything?

It varies, and it varies a lot. Some people say they notice something the first night, and for others it takes a few weeks. Your age, your routine and how much magnesium you were already getting all play a part.

What shifts an evening is repeating it, not any single night. Magnesium contributes to normal psychological function, to normal functioning of the nervous system and to the reduction of tiredness and fatigue. Give it two to three months of nightly use before you judge it.

The companion app plots your nights, so you get your own answer instead of ours.

Will it leave me groggy in the morning?

There is no melatonin and no sedative in the pouch. Nothing in Hour Seven works by sedating you.

It is 200mg of magnesium as bisglycinate with the NightSync™ blend. You drink it at the end of your evening, as the last step of a routine rather than as a sleeping pill.

Can I take it every night?

That is how it is meant to be used. One 7g scoop each evening at the same hour, night after night, because the routine is the product.

Two paid deliveries minimum, then skip, pause or cancel. Approved first-order trial refunds release the remaining minimum. Hour Seven is a food supplement, not a sedative.

What if Hour Seven is not for me?

One-time purchases have 60 days from delivery. For new subscriptions, the first-order trial ends 60 days after delivery or at the second successful payment, whichever comes first.

If you are not sleeping more deeply, contact help@hourseven.com before that deadline for a full refund. Opened and part-used pouches are included. An approved first-order trial refund releases the remaining minimum and cancels future payments. Claims submitted in time, earlier purchase terms and statutory rights are unaffected.

Someone here had your night

5 out of 5 stars

I stopped mentioning the 3am thing to people because there is nothing they can say. You just lie there doing sums.

Four weeks in, last week I woke twice, both times before midnight, both times went back off. My husband noticed before I did.

Rachel M., Mother of 3

5 out of 5 stars

I track everything, so I went in expecting nothing. First fortnight, nothing worth reporting.

Weeks three and four my deep sleep average went from 48 minutes to 71, and the week before my period stopped being the write-off it normally is. I have the graphs. That is the only reason I am still buying it.

Priya K., Pharmacologist

5 out of 5 stars

The week before my period I would wake at 3 and be furious about it. Not sad. Furious.

It is a nightly thing now, hot, same mug, and the fury has gone somewhere. I am not claiming it fixed my cycle. I am claiming I sleep through it.

Megan D., Influencer

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