Percentage Calculator

Percentage calculators handle every kind of percent question — percent of a number, percent change and difference, increases and decreases, and conversions between percentages, grades, and degrees. Popular tools include the Percentage Calculator, Percent Change Calculator, Percentage Increase Calculator, Percentage Growth Calculator, and Percentage Deviation Calculator.

Pick the exact percentage task below for an instant, worked answer, or open the Trending tab to see what's in demand this week. Everything is free and works on any device.

  • Percentage Deviation Calculator
    Calculate percentage deviation easily with input for expected and actual values. Determine the variance between predicted and real outcomes for accurate analysis and decision-making.
  • Reverse Percentage Calculator
    Find the original price before a discount or increase. Enter the final price and the percentage to reverse-calculate the starting value instantly.
  • Percentage Increase Calculator
    Find the percent increase between two numbers in seconds. Enter the original and new value to get the exact growth percentage with the formula. Try it free.
  • Percent Grade to Degrees Calculator
    Convert a percent grade (slope) into degrees instantly. Enter the grade % to get the slope angle in degrees and radians using arctangent.
  • Percentage Calculator
    Calculate percentages easily with this Percentage Calculator. Input numbers and select from options like percentage of a number, number as a percentage of another, or percentage change between two numbers for quick results.
  • Percent Change Calculator
    Calculate percent change from original and new values. See increase or decrease, the difference, and absolute percent change in seconds.
  • Percent of People Calculator
    Find what percent of a group a count represents. Enter a count and total to instantly calculate the percentage of people, plus the remaining share.
  • Percentage Growth Calculator
    Enter initial and final values to calculate percent change using (final - initial)/initial * 100 and see how much it increased or decreased.
  • Original Price Before Discount Calculator
    Find the original price before a discount. Enter the sale price and discount percentage to reverse-calculate the pre-discount price and amount saved.
  • Stock Price Percent Gain/Loss Calculator
    Calculate the percentage gain or loss on a stock from its buy and sell price. Get profit per share and total profit instantly. Free and universal.
  • Percentage Decrease Calculator
    Find the percent decrease between two numbers instantly. Enter the original and new values to get an exact result with the formula shown — free and easy.
  • Percentage Difference Calculator
    Enter two values to calculate percentage difference using the average-based formula, plus the absolute and relative differences, all in one tool.
  • Two-Thirds (2/3) as a Percentage Calculator
    Convert any fraction or part-out-of-number into a percentage instantly. Enter numerator and denominator to get the percent and decimal value.
  • Fraction to Percent Calculator
    Convert any fraction into a percentage instantly. Enter the numerator and denominator to get the exact percent and decimal equivalent.
  • Double Discount Calculator
    Calculate the final price after applying two successive (stacked) discounts. See your final price, total savings, and the true effective discount rate.
  • Percentage Discount Calculator
    Calculate the sale price and money saved from a percentage discount. Enter the original price and discount percent to instantly see your final price.
  • Percentage Point Calculator
    Calculate the percentage point (pp) change between two percentages and the relative percent change. Free, instant, and easy to use.
  • Ratio Unit Conversion Calculator
    Convert a dimensionless ratio between percent, permille, permyriad (basis points), ppm, ppb, ppt and ppq instantly. Free universal ratio unit converter.
  • Percent to Decimal & Fraction Calculator
    Convert any percentage to its decimal value and a reduced (simplified) fraction instantly. Free, accurate percent-to-decimal and percent-to-fraction tool.
  • Spending as Percent of Income Calculator
    Calculate what percentage of your income goes to a spending category. Enter category spending and total income to see the percent and remaining amount.
  • What Percentage Did I Tip?
    Find out what percentage you tipped. Enter your bill and tip amount to instantly calculate the tip percentage and total paid.
  • Percent Proportion Solver for X
    Solve the percent proportion part/whole = percent/100 for any unknown. Find the part, the whole, or the percent instantly with steps.
  • Percent Improvement Calculator
    Calculate percent improvement easily with this free online tool. Enter the original value and new value to determine the percentage of improvement or decline in various scenarios.
  • What Number Is X% Less Than Y?
    Find what number is X percent less than Y. Enter the percent and the base number to instantly get the reduced value and the amount subtracted.

Frequently asked questions

What percentage problems can I solve here?

What is X% of Y, what percent is X of Y, percent increase or decrease, percent change and difference, percentage growth over time, and conversions such as percent grade to degrees.

What's the difference between percent change and percentage points?

Percent change is relative to the starting value, while percentage points are a simple difference between two percentages. Choose the tool that matches which one you need.

Are these calculators free?

Yes — free, no sign-up, and they work on any device.

Do they show the formula?

Yes — most show the calculation so you can see how the percentage was worked out, not just the final number.

Which percentage tools are most popular?

The list is ordered by usage; the Trending, Recently added, and Last updated tabs show what's new and rising.

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