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WeightWorldSports & performance

Electrolyte Complex Tablets

£16.49 for 90 servings at WeightWorld. That works out at 18p per serving, which ranks it 4th of the 260 electrolytes we price across 9 UK retailers.

What it really costs, per serving18pOne serving is our comparison unit for electrolytes. It is not a recommendation.
A day18p
A week£1.28
A month£5.50
A year£66.88

At one serving a day, this pack lasts 3 months. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Electrolytes

  • In the pack: 90 × 1 serving = 90 servings
  • £16.49 ÷ 90 servings × 1 serving = 18.3p per serving
  • A week 18.3p × 7 = £1.28 · a month × 30 = £5.50 · a year × 365 = £66.88
  • Amount per serving: priced per serving — compare what each serving contains before choosing.

Calcium

  • In the pack: 90 × 250 mg = 22.5 g
  • £16.49 ÷ 22.5 g × 500 mg = 36.6p per 500 mg calcium
  • A week 36.6p × 7 = £2.57 · a month × 30 = £10.99 · a year × 365 = £133.75
  • Amount per serving: stated on the label.

Magnesium

  • In the pack: 90 × 150 mg = 13.5 g
  • £16.49 ÷ 13.5 g × 100 mg = 12.2p per 100 mg magnesium
  • A week 12.2p × 7 = 86p · a month × 30 = £3.66 · a year × 365 = £44.58
  • Amount per serving: stated on the label.

Potassium

  • In the pack: 90 × 500 mg = 45 g
  • £16.49 ÷ 45 g × 200 mg = 7.33p per 200 mg potassium
  • A week 7.33p × 7 = 51p · a month × 30 = £2.20 · a year × 365 = £26.75
  • Amount per serving: stated on the label.

The standard dose is a comparison unit, not a recommendation. Always confirm the price on the retailer's site. How we compare everything.

Cheaper electrolytes

All 260, ranked →
Electrolyte PowderCheapest per servingBulk · 1 serving a serving · £1.80 a month · a pack lasts 1.4 years6p£29.99View at Bulk (opens in a new tab)
Electrolyte PowderBulk · 1 serving a serving · £2.04 a month · a pack lasts 8 months7p£16.99View at Bulk (opens in a new tab)
Electrolyte PowderBulk · 1 serving a serving · £2.99 a month · a pack lasts 50 days10p£4.99View at Bulk (opens in a new tab)
WeightWorldThis productWeightWorld · 1 serving a serving · £5.50 a month · a pack lasts 3 months18pshown above

Switching to the Bulk pack saves £3.70 a month at one serving a day.

Ranked purely by price per serving. 32 combination products also contain electrolytes.

How it compares: calcium carbonate

All 5, ranked →
Chewable Calcium + Vitamin D Vanilla 60 TabletsCheapest per 500 mg calciumBoots · 800 mg a serving · £2.50 a month · a pack lasts 48 days8p£4.00View at Boots (opens in a new tab)
Chewable Calcium & Vitamin D3 TabletsSimply Supplements · 800 mg a serving · £3.12 a month · a pack lasts 3 months10p£9.99View at Simply Supplements (opens in a new tab)
Ultra CalciumVitabiotics · 1 g a serving · £3.65 a month · a pack lasts 30 days12p£3.65View at Vitabiotics (opens in a new tab)
WeightWorldThis productWeightWorld · 250 mg a serving · £10.99 a month · a pack lasts 45 days37pshown above

Ranked purely by price per 500 mg calcium. 86 combination products also contain calcium.

How it compares: magnesium citrate

All 38, ranked →
Magnesium Citrate Tablets 700mgCheapest per 100 mg magnesiumSimply Supplements · 700 mg a serving · 50p a month · a pack lasts 2.3 years2p£13.99View at Simply Supplements (opens in a new tab)
Natures AidMagnesium Citrate 750mg 60 CapsulesLloyds Pharmacy · 750 mg a serving · 76p a month · a pack lasts 1.2 years3p£11.45View at Lloyds Pharmacy (opens in a new tab)
Magnesium CitrateHealf · 400 mg a serving · £1.54 a month · a pack lasts 11 months5p£16.45View at Healf (opens in a new tab)
WeightWorldThis productWeightWorld · 150 mg a serving · £3.66 a month · a pack lasts 4 months12pshown above

Ranked purely by price per 100 mg magnesium. Labels here do not all state the same thing: this one gives stated on the label, the cheapest gives estimated from the compound weight using our conversion factor. Check both before choosing. 187 combination products also contain magnesium.

How it compares: potassium chloride

Compare every product in this form →
Liquid PotassiumCheapest per 200 mg potassiumHealf · 99 mg a serving · £34.81 a month · a pack lasts 15 days£1.16£17.23View at Healf (opens in a new tab)
WeightWorldThis productWeightWorld · 500 mg a serving · £2.20 a month · a pack lasts 7 months7pshown above

Ranked purely by price per 200 mg potassium. 149 combination products also contain potassium.

On the label

Electrolytes · Electrolytes (per serving)
1 serving per serving (priced per serving — compare what each serving contains before choosing)
Calcium · Carbonate
250 mg per serving (stated on the label)
Pack
90 servings · 2 tablet(s) a serving
Cost per serving
18p (90 servings in the pack)
More label details
Magnesium · Citrate
150 mg per serving (stated on the label)
Potassium · Chloride
500 mg per serving (stated on the label)
Sold by
WeightWorld
What the listing says
“Servings per Container: 90” · “Serving Size: 2 Tablets” · “Calcium (as Calcium Carbonate) ; 250 mg”
Ingredients

Microcrystalline Cellulose, Anti-Caking Agents (Magnesium Salts Of Fatty Acids, Silicon Dioxide) Advice Do not exceed the recommended daily dose. Food supplements must not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Discontinue use if any adverse reactions occur. Not intended for use by persons under the age of 18.

From the WeightWorld listing. Check the pack itself if you have an allergy: labels mark allergens in bold.

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One serving is our comparison unit, not a recommendation.

Price history

No price change since 9 October 2026. Checked on 1 day, most recently 9 October 2026.

Price at every check
£16.49WeightWorld
First recorded
£16.499 Oct
Checked on
1 daysince 9 Oct

Checked once so far, on 9 October 2026.

  1. First checked at WeightWorld: £16.49

Questions about this product

How much does WeightWorld Electrolyte Complex Tablets cost per 500 mg calcium?

37p per 500 mg calcium, from £16.49 for 90 servings at WeightWorld, checked on 9 October 2026.

How long does one pack last?

45 days at one 500 mg dose. The pack holds 22.5 g in total.

How much does WeightWorld Electrolyte Complex Tablets cost per serving?

18p per serving, from £16.49 for 90 servings at WeightWorld, checked on 9 October 2026.

Is it the cheapest of the electrolytes in the UK?

No, it is 4th of 260. Electrolyte Powder at Bulk works out at 6p per serving.

How long does one pack last?

3 months at one serving. The pack holds 90 servings in total.

How much does WeightWorld Electrolyte Complex Tablets cost per 100 mg magnesium?

12p per 100 mg magnesium, from £16.49 for 90 servings at WeightWorld, checked on 9 October 2026.

How long does one pack last?

4 months at one 100 mg dose. The pack holds 13.5 g in total.

How much does WeightWorld Electrolyte Complex Tablets cost per 200 mg potassium?

7p per 200 mg potassium, from £16.49 for 90 servings at WeightWorld, checked on 9 October 2026.

How long does one pack last?

7 months at one 200 mg dose. The pack holds 45 g in total.

About WeightWorld

All 124 WeightWorld products, priced per dose

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