Start here
If you’re comparing numbers, start with percentage change.
Percentage Change Calculator
Find percent increase/decrease from an old value to a new value.
Percent Off Calculator
Discount math (sale price, savings, final price).
Percentage Calculator
What is X% of Y? X is what percent of Y? etc.
Math clusters
A simple structure you can expand as you add more calculators.
Percentages
Change, discount, percent-of, and reverse percent.
Stats & Averages
Mean/median, averages, and quick distributions.
Fractions
Simplify fractions, fraction to percent/decimal.
Ratios
Ratio simplifier and proportion calculators.
Rounding
Round to decimals, nearest whole, sig figs.
Unit Math
Basic conversions and quick compute helpers.
Popular math tools
Quick links people use most often.
Percentage Change Calculator
Percent increase/decrease from old to new value.
Percent Off Calculator
Discount and sale price calculator.
Percentage Calculator
Percent-of, reverse percent, and percent difference style prompts.
Average Calculator
Mean average for a list of numbers.
Fraction Simplifier
Reduce fractions and show steps (optional).
What you can do here
- Compare numbers quickly with percent change.
- Do everyday discount and percentage math.
- Handle basic stats (averages) and fractions.
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