How long does it take to descale a shower?

An enclosed shower cubicle with moderate limescale takes roughly 30 minutes of active cleaning, plus 15 minutes of soak time. Heavy build-up can double the time due to repeated applications and scrubbing. Over-bath showers are slightly quicker as there is less glass to treat.

What is the best descaler for shower limescale in the UK?

Citric acid-based descalers are effective and less harsh than hydrochloric acid products. Popular UK brands include Viakal, HG Limescale Remover and Kilrock. For heavy build-up, a dedicated bathroom limescale remover with a spray nozzle works best. Always ventilate the bathroom well.

How often should I descale my shower?

In hard water areas of England (London, South East, East Anglia), descale every 2-4 weeks to prevent heavy build-up. In soft water areas (Scotland, Wales, North West), every 1-3 months is usually sufficient. A quick wipe-down after each shower reduces the need for deep descaling.

How do I descale a shower head?

Remove the shower head and soak it in a bowl of white vinegar or citric acid solution for 30-60 minutes. For fixed heads, fill a plastic bag with vinegar, tie it around the head and leave it to soak. Use an old toothbrush to clear any remaining deposits from the jets.

CleanCalcs

Shower Descaling Calculator

Estimate descaling time and product volume based on shower type and limescale severity.

Shower Type

Select your shower setup

Limescale Severity

How bad is the limescale?

Include shower head descaling?

+10 mins for removing and soaking the shower head

Include tile descaling?

+15 mins for wall tile limescale removal

How We Calculate This

This calculator estimates active descaling time and descaler volume based on shower type and limescale severity, with optional extras for shower head and tile descaling.

Base times

Enclosed cubicle: 30 minutes
Over-bath shower: 25 minutes
Walk-in / wet room: 35 minutes
Electric shower (head only): 15 minutes

Severity multiplier

Light: 0.7x, Moderate: 1.0x, Heavy: 1.4x, Severe: 1.8x. Soak times increase with severity from 5 to 45 minutes.

Extras

Shower head: +10 minutes. Tile descaling: +15 minutes. Descaler volume is estimated at approximately 5 ml per minute of active cleaning.

Frequently Asked Questions

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Last updated: March 2026

All calculations are estimates. Always verify quantities and timings for your specific situation.