For a normal load of everyday clothes in soft to medium water, around 35 ml of liquid detergent is a typical starting point, but always check your detergent's own dosing guide, because concentrates vary. Use more for heavily soiled loads or hard water, and less for small or lightly worn loads. A capsule is one full dose, so do not add extra. Too much detergent does not clean better; it leaves residue, smells and stiff fabric.
Most of us dose detergent by habit: a full cap, a generous scoop, a pod "just in case". Getting it right saves money, protects your machine and is one of the quickest ways to fresher laundry. It is a core part of our guide to getting the best smelling laundry in the UK.
Why the Right Dose Matters
A Samsung UK survey found that 58% of people are unsure how much detergent to use, and only 24% regularly adjust the amount to the size of the load. That matters both ways:
Too Much
Residue in fabric, stiff towels, itchy skin, excess suds, a musty machine and money washed down the drain.
Too Little
Greying whites, lingering body odour, stains that do not lift and, in hard water areas, more limescale on fabric and in the machine.
The Three Things That Decide Your Dose
| Factor | Use less | Standard dose | Use more |
|---|---|---|---|
| Load size | Small or half load | Normal load (around 4 to 5 kg) | Full drum |
| Soil level | Lightly worn, freshen-up | Everyday wear | Muddy, stained or sportswear |
| Water hardness | Soft water | Medium | Hard or very hard water |
Manufacturer guidance gives useful starting points. Bosch UK says a front-loading machine generally needs about 35 ml of liquid for a normally soiled load in soft to medium water. Your detergent pack will show its own table, which is always the best guide for that product.
Do not know your water hardness? Your water company can tell you from your postcode. Much of southern and eastern England has hard or very hard water, so a slightly higher dose is often needed there.
Signs You Are Using Too Much Detergent
- Foam is still visible in the drum during the final rinse.
- Towels feel stiff or scratchy even after conditioner.
- White streaks or a chalky film appear on dark clothes.
- The door seal has grey slime and the machine smells musty.
- Skin feels itchy where clothes fit closely.
A musty machine is one of the clearest signs. Our guide to why washing smells musty explains how leftover detergent feeds the build-up.
How to Measure Detergent Accurately
- Judge the load. A full drum, loosely packed with a hand's width of space at the top, is roughly your machine's stated capacity.
- Check your water hardness once, so you know which column of the dosing table to use.
- Read the pack. Doses differ between brands and between concentrated and standard products.
- Use the markings. Measure with the cap or scoop rather than pouring freehand.
- Adjust after a few washes. If you see the signs of overdosing, cut back a little at a time.
Capsules, Sheets and Concentrates
Capsules and sheets make overdosing harder, but they cannot be split for small loads. Save them for full loads, and only use two for very large or heavily soiled washes if the pack says so. Concentrated liquids need smaller doses than standard ones, so do not use the same amount out of habit. Never combine formats, such as a capsule plus liquid, in the same wash.
Our Pick for Everyday Washing
Signature Detergent No.102 (16 fl oz)
An enzyme-powered liquid that lifts stains without bleach. Liquid detergent is easy to measure precisely, so you can match the dose to each load instead of guessing.
View ProductQuick Summary
- Around 35 ml of liquid is a typical starting point for a normal load in soft to medium water.
- Adjust for load size, soil level and water hardness.
- Follow your detergent's own dosing table.
- Foam in the rinse, stiff towels and a musty machine mean too much.
- One capsule is one dose; save capsules for full loads.
Frequently Asked Questions
How much liquid detergent should I use per wash?
Around 35 ml is a common starting point for a normal, everyday load in soft to medium water. Check your detergent's pack, as concentrated products need less.
How much washing powder should I use?
Powder doses are larger by volume than liquid. Use the scoop and the pack's table for your load size, soil level and water hardness.
Is it bad to use too much detergent?
Yes. Excess detergent does not rinse out fully, leaving clothes stiff, causing skin irritation and building up inside the machine, where it can cause musty smells.
Should I use more detergent in hard water?
Usually a little more. Minerals in hard water reduce how well detergent works. Detergent packs often give a separate dose for hard water.
How do I know if I am using too much detergent?
Look for foam in the final rinse, stiff towels, white streaks on dark clothes and a smelly door seal. Cut back gradually until those signs disappear.
Do I need more detergent for a hotter wash?
Not usually. Dose depends mainly on load size, soil level and water hardness rather than temperature.
Sources: Bosch UK, Laundry detergent tips; Samsung UK, Detergent dilemmas survey; Drinking Water Inspectorate, Water hardness.