NumLuma›Calculators›Percentage & Price Calculators

Everyday number questions

Percentage & Price Calculators

Percentages appear everywhere: discounts, price changes, tips, rates and comparisons. This toolkit keeps the arithmetic visible so you can understand the answer as well as calculate it.

NumLuma Journey

A useful order, not just a list.

Start with the first question, then move through the connected calculations. You can jump in anywhere, but the sequence keeps the task coherent.

Step 1 of 6

01 Start here Percentage

Find X% of any number.

02 Next calculation Percentage Change

Measure percentage increase or decrease.

03 Next calculation Discount

Calculate sale price and savings.

04 Next calculation Tip

Split a bill with tip.

05 Next calculation Unit Price

Find price per item, weight or unit.

06 Next calculation Split Bill

Split a total bill evenly with optional tip.

Start calculating

Everything you need for this job.

Each tool is free, works without an account and links to its formula, assumptions and related calculators.

Browse all calculators →

ED Everyday

Percentage Calculator

Find X% of any number.

NL / ED Open

ED Everyday

Percentage Change Calculator

Measure percentage increase or decrease.

NL / ED Open

ED Everyday

Discount Calculator

Calculate sale price and savings.

NL / ED Open

ED Everyday

Tip Calculator

Split a bill with tip.

NL / ED Open

ED Everyday

Unit Price Calculator

Find price per item, weight or unit.

NL / ED Open

ED Everyday

Split Bill Calculator

Split a total bill evenly with optional tip.

NL / ED Open

MT Math

Decimal to Percent Calculator

Turn a decimal into percent.

NL / MT Open

MT Math

Percent to Decimal Calculator

Turn a percent into a decimal.

NL / MT Open

MT Math

Ratio Calculator

Reduce a ratio to simplest form.

NL / MT Open

MT Math

Proportion Calculator

Solve for x in a proportion.

NL / MT Open

Before you calculate

Useful context, not filler.

NumLuma groups tools around real tasks so you can move from one calculation to the next without starting your research over.

Is percentage change the same as percentage points?

No. Percentage change compares the difference with the original value. Percentage points describe the direct difference between two percentage values.

When should I round a percentage?

Keep extra precision during the calculation and round the final result to the level that is useful for the decision.