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BulkSports & performance

Electrolyte Powder, Unflavoured, 1 kg

£29.99 for 1 kg at Bulk. That works out at 6p per serving, which ranks it 1st of the 260 electrolytes we price across 9 UK retailers.

What it really costs, per serving6pOne serving is our comparison unit for electrolytes. It is not a recommendation.
A day6p
A week42p
A month£1.80
A year£21.89

At one serving a day, this pack lasts 1.4 years. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Electrolytes

  • Servings: 1000 ÷ 2 per serving = 500
  • In the pack: 500 × 1 serving = 500 servings
  • £29.99 ÷ 500 servings × 1 serving = 6p per serving
  • A week 6p × 7 = 42p · a month × 30 = £1.80 · a year × 365 = £21.89
  • Amount per serving: priced per serving — compare what each serving contains before choosing.

Calcium

  • Servings: 1000 ÷ 2 per serving = 500
  • In the pack: 500 × 184 mg = 92 g
  • £29.99 ÷ 92 g × 500 mg = 16.3p per 500 mg calcium
  • A week 16.3p × 7 = £1.14 · a month × 30 = £4.89 · a year × 365 = £59.49
  • Amount per serving: stated on the label.

Magnesium

  • Servings: 1000 ÷ 2 per serving = 500
  • In the pack: 500 × 30 mg = 15 g
  • £29.99 ÷ 15 g × 100 mg = 20p per 100 mg magnesium
  • A week 20p × 7 = £1.40 · a month × 30 = £6.00 · a year × 365 = £72.98
  • Amount per serving: stated on the label.

Potassium

  • Servings: 1000 ÷ 2 per serving = 500
  • In the pack: 500 × 306 mg = 153 g
  • £29.99 ÷ 153 g × 200 mg = 3.92p per 200 mg potassium
  • A week 3.92p × 7 = 27p · a month × 30 = £1.18 · a year × 365 = £14.31
  • 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.

How it compares: electrolytes

All 260, ranked →
This productCheapest per servingBulk · 1 serving a serving · £1.80 a month · a pack lasts 1.4 years6pshown above
Electrolyte PowderBulk · 1 serving a serving · £2.04 a month · a pack lasts 8 months7p£16.99View at Bulk (opens in a new tab)

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

How it compares: other forms of calcium

All 25, ranked →
Calcium 1000mg & Vitamin D3 400iu TabletsCheapest per 500 mg calciumSimply Supplements · 1 g a serving · 94p a month · a pack lasts 12 months3p£11.29View at Simply Supplements (opens in a new tab)
Calcium & Magnesium TabletsMyprotein · 800 mg a serving · £2.29 a month · a pack lasts 5 months8p£10.99View at Myprotein (opens in a new tab)
ZipVitCalcium 400mg with Magnesium 200mgZipVit · 400 mg a serving · £2.29 a month · a pack lasts 9 months8p£21.99View at ZipVit (opens in a new tab)
This productBulk · 184 mg a serving · £4.89 a month · a pack lasts 6 months16pshown above

Ranked purely by price per 500 mg calcium. 216 combination products also contain calcium.

How it compares: magnesium oxide

All 9, ranked →
Magnesium 375mg 180 Tablets (3 month supply)Cheapest per 100 mg magnesiumBoots · 375 mg a serving · £1.14 a month · a pack lasts 11 months4p£12.85View at Boots (opens in a new tab)
Magnesium 375mg 60 Tablets (1 Month Supply)Boots · 375 mg a serving · £1.41 a month · a pack lasts 4 months5p£5.30View at Boots (opens in a new tab)
Magnesium Tablets 200mgSimply Supplements · 100 mg a serving · £1.61 a month · a pack lasts 12 months5p£19.29View at Simply Supplements (opens in a new tab)
This productBulk · 30 mg a serving · £6.00 a month · a pack lasts 5 months20pshown above

Ranked purely by price per 100 mg magnesium. 91 combination products also contain magnesium.

How it compares: other forms of potassium

Compare every product in this form →
Ionic Potassium Liquid ConcentrateCheapest per 200 mg potassiumHealf · 300 mg a serving · £15.60 a month · a pack lasts 38 days52p£19.50View at Healf (opens in a new tab)
Ionic Potassium Liquid ConcentrateMyprotein · 300 mg a serving · £16.00 a month · a pack lasts 38 days53p£20.00View at Myprotein (opens in a new tab)
This productBulk · 306 mg a serving · £1.18 a month · a pack lasts 2.1 years4pshown above

Ranked purely by price per 200 mg potassium. 58 combination products also contain potassium.

Pack sizes

PackPricePer doseA year
1 kgthis pack£29.996p£21.89
500 g£16.997p£24.81
100 g£4.9910p£36.43

This pack is the cheapest of the 3 sizes per dose.

On the label

Electrolytes · Electrolytes (per serving)
1 serving per serving (priced per serving — compare what each serving contains before choosing)
Calcium · Other forms
184 mg per serving (stated on the label)
Pack
1 kg · 500 servings · 2 g a serving
Cost per serving
6p (500 servings in the pack)
More label details
Magnesium · Oxide
30 mg per serving (stated on the label)
Potassium · Other forms
306 mg per serving (stated on the label)
Barcode
5055950625372
Sold by
Bulk
What the listing says
“1kg” · “approximately 2 g” · “[Calcium ; 184 mg ; 23% RI]”
Ingredients

Sodium Chloride, Potassium Sulphate, Dicalcium Phosphate, Magnesium Oxide.

From the Bulk 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 21 September 2026. Checked on 1 day, most recently 21 September 2026.

Price at every check
£29.99Bulk
First recorded
£29.9921 Sept
Checked on
1 daysince 21 Sept

Checked once so far, on 21 September 2026.

  1. First checked at Bulk: £29.99

Questions about this product

How much does Bulk Electrolyte Powder cost per 500 mg calcium?

16p per 500 mg calcium, from £29.99 for 1 kg at Bulk, checked on 21 September 2026.

How long does one pack last?

6 months at one 500 mg dose. The pack holds 92 g in total.

How much does Bulk Electrolyte Powder cost per serving?

6p per serving, from £29.99 for 1 kg at Bulk, checked on 21 September 2026.

Is it the cheapest of the electrolytes in the UK?

Yes. Of the 260 we price across 9 UK retailers, this is the cheapest per serving.

How long does one pack last?

1.4 years at one serving. The pack holds 500 servings in total.

How much does Bulk Electrolyte Powder cost per 100 mg magnesium?

20p per 100 mg magnesium, from £29.99 for 1 kg at Bulk, checked on 21 September 2026.

How long does one pack last?

5 months at one 100 mg dose. The pack holds 15 g in total.

How much does Bulk Electrolyte Powder cost per 200 mg potassium?

4p per 200 mg potassium, from £29.99 for 1 kg at Bulk, checked on 21 September 2026.

How long does one pack last?

2.1 years at one 200 mg dose. The pack holds 153 g in total.

About Bulk

Founded 2006 · Colchester, England

Bulk is a British sports nutrition company based in Colchester, Essex. Adam Rossiter and Elliot Dawes, who met at the University of Essex, started it in 2006 as Bulk Powders; it was renamed Bulk at the start of 2021, and the founders remain its majority owners.

All 133 Bulk products, priced per doseVisit Bulk (opens in a new tab)

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