Calculate percentages instantly with our free and accurate online percentage calculator. Easily find percentage increases, decreases, ratios, and totals in seconds — perfect for students, professionals, and everyday math.
Get precise results in three easy steps
Input your numbers clearly labeled for each type. The calculator automatically applies the right percentage formula.
See your percentage result with a full explanation, showing exactly how the formula was applied.
Perform advanced operations like trigonometry, logarithms, and exponentials.
Calculate the volume of spheres, cylinders, and other 3D shapes.
Simplify, add, subtract, and multiply fractions with step-by-step solutions.
Convert and calculate between binary, decimal, and hexadecimal numbers.
Find square, cube, and nth roots instantly.
Solve quadratic equations quickly and get real or complex roots.
Percentages express numbers as parts of 100 — a universal way to compare proportions. The word “percent” comes from the Latin per centum, meaning “by the hundred.” Percentages are essential in math, finance, and everyday decisions.
It quickly finds percentages, percentage changes, and ratios — useful for finance, grades, discounts, and data analysis.
Use ((New - Old) ÷ Old) × 100. Example: From 50 to 75 = 50% increase.
Use ((Old - New) ÷ Old) × 100. Example: From 80 to 60 = 25% decrease.
Yes. Enter the discount percent and original price — it instantly calculates the sale price and savings.
Percentage = (Part ÷ Whole) × 100. Example: 30 of 120 = 25%.
Multiply the decimal by 100 and add the % symbol. Example: 0.8 → 80%.
Subtract the old value from the new, divide by the old value, and multiply by 100.
Yes. It’s perfect for interest rates, investment growth, and sales tax calculations.
Find 10% of a number by dividing by 10, then scale up or down. Example: 30% = 10% × 3.
Yes. It’s completely free, accurate, and available online anytime.