How much solution do I need per window?

Traditional squeegee methods use about 30ml of diluted solution per m² of glass. Water-fed pole systems use significantly more — around 100ml per m² — because the pure water rinses the glass continuously. Spray and wipe methods use the least at about 20ml per m².

What dilution ratio should I use for window cleaning?

Most window cleaning detergents are used at 1:50 to 1:200. For traditional squeegee work, a weaker dilution (1:100 to 1:200) works well. For first cleans or very dirty windows, use a stronger mix (1:50). Water-fed pole systems typically use pure water with no additive.

Can I use washing-up liquid for window cleaning?

While washing-up liquid works in an emergency, it leaves a residue that attracts dirt faster and can cause streaking. Professional window cleaning solutions are formulated to evaporate cleanly, provide lubrication for the squeegee, and leave no residue on the glass.

What is the best method for streak-free windows?

For best results: use fresh solution (not reused water), use a strip washer to apply solution evenly, squeegee from top to bottom in overlapping passes, wipe the squeegee blade after each pass, and detail the edges with a dry cloth. Work in the shade — sun dries solution too quickly causing streaks.

CleanCalcs

Window Cleaning Solution Calculator

Calculate the correct mix ratio of water and cleaning solution for window cleaning.

Total Glass Area

Combined glass area

Cleaning Method

Dilution Ratio (1:X)

Check product label

Concentrate Cost per Litre

Optional

How We Calculate This

How the calculation works

Solution volume is estimated from the total glass area and the cleaning method.

Solution usage rates (litres per m²)

Traditional squeegee: 0.03 L/m²
Water-fed pole: 0.10 L/m²
Spray and wipe: 0.02 L/m²

Formulae

Total solution = glass area × usage rate

Concentrate = total solution ÷ (dilution ratio + 1)

Water = total solution − concentrate

Frequently Asked Questions

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Window Solution Mix Calculator

Work out the exact volume of pure water additive for window cleaning solutions.

Last updated: February 2026

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