◧MeasureThenConstruction Calculators

Percentage Calculator

Calculate percentages, percentage change, and ratios.

How It Works

Result = Value × Percentage ÷ 100.

Example

15% of 200 is 30.

Frequently Asked Questions

When is this useful on a job site?

For discounts, taxes, progress percentages, and comparing bid overruns.

Can I reverse it?

This tool finds the percentage of a value. For other conversions, combine it with the markup or waste calculators.

Does it handle decimals?

Yes — enter any value and percentage, and the result rounds to two decimals.

More General Calculators

Area CalculatorCalculate the area of rectangles, triangles, and circles.Volume CalculatorCalculate the volume of common building shapes.Square Footage CalculatorCalculate the square footage of a room or building.Waste Factor CalculatorAdd a waste or overage percentage to material quantities.Slope CalculatorCalculate slope as a percentage, ratio, or degrees.Markup CalculatorCalculate markup and selling price from cost.