Essential & Basic Math
What is X% of Y?
Instantly calculate the exact numerical value of a specific percentage from a starting base number.
Percentage of Total
Find what percentage one number is of another. Perfect for analyzing test scores and statistics.
Percent Change
Calculate the exact percentage increase or decrease between an initial and final value.
Reverse Percentage
Work backwards from a known value and its percentage to uncover the original 100% total.
Increase by Percentage
Calculate the final amount after applying a specific percentage increase to an original number.
Decrease by Percentage
Calculate the final amount after applying a specific percentage decrease to an original number.
Average Percentage
Calculate the mean average of multiple percentages. Paste lists from Excel directly.
Points Change
Calculate the absolute difference in percentage points (pp) vs. relative percent change.
% of a Percentage
Find the cumulative result when one percentage is applied to another.
Business & Finance
Profit Margin
Calculate your exact gross profit, profit margin, and markup percentage based on cost and revenue.
Markup Percentage
Determine retail selling prices based on cost, or reverse-calculate markup from revenue.
ROI Calculator
Calculate your exact Return on Investment (ROI) and net profit instantly for any venture.
CAGR Calculator
Calculate the Compound Annual Growth Rate of an investment over multiple years.
Inflation Calculator
Calculate future purchasing power loss, cumulative inflation, and price changes over time.
Commission %
Calculate your exact sales commission, total earnings, and the net remaining amount.
Tax Calculator
Add tax to a price or precisely extract tax from a final receipt. Perfect for VAT and GST.
Salary Change %
Instantly calculate your exact pay raise, salary increase, or pay cut as a clean percentage.
Percentage Recovery
Find out exactly what percentage gain is mathematically required to bounce back from a loss.
Academic & Grades
Attendance Percentage
Check current attendance and find out how many classes you can skip or need to hit targets.
CGPA to Percentage
Instantly convert your CGPA to an exact percentage using standard university multipliers.
SGPA to Percentage
Convert your Semester Grade Point Average (SGPA) to a percentage using standard formulas.
GPA to SGPA / Credits
Calculate credit-weighted semester GPAs across 4.0 and 10.0 grading scales.
Weighted Grade
Quickly calculate your true final course grade using category weights and percentages.
Required Marks %
Calculate the exact score required on your final exam to hit a specific target class grade.
Percentage Share
Calculate the exact percentage share of multiple items in a budget or dataset.
Percentage Allocation
Easily divide a total amount into exact numerical values based on specific target percentages.
Percent to Goal
Calculate your percentage achieved and track the remaining amount to hit targets.
Everyday & Shopping
Discount Calculator
Find the final sale price, or reverse-calculate to find the hidden discount percentage.
Double Discount
Calculate stacked coupons and sequential percentage off deals to discover true savings.
Multiple Discounts
Stack successive percentage discounts to find the true final sale price and savings amount.
Body Fat Percentage
Accurately estimate body fat %, lean mass, and fat mass using official US Navy formulas.
Weight Loss %
Calculate your exact weight loss progress as a percentage of your starting weight.
Tip Percentage
Calculate tips, find the final total, and accurately split the bill with friends instantly.
Time Percentage
Determine what percentage of a total duration a specific time period represents.
Vote Percentage
Calculate the exact percentage of votes received by multiple candidates or options.
Percentage Completion
Calculate exact progress percentage based on completed versus required tasks.
Conversions & Technical Math
Percent to Fraction
Instantly convert any percentage into a simplified fraction and decimal equivalent.
Decimal to Percent
Instantly convert decimal values into formatted percentages and simplified fractions.
Percent to Decimal
Instantly convert any percentage into a pure decimal number and simplified fraction.
Fraction to Percent
Convert proper and improper fractions to percentages instantly with decimals.
Percentage Ratio
Convert any ratio (like 3:1) into its exact percentage distribution components.
Percent Error
Calculate the percentage error between experimental and theoretical values.
Tolerance Threshold
Calculate specification bounds (±X%) and test measured values against limits.
Slope Percentage
Instantly convert vertical rise and horizontal run into slope grade percentage and angle.
Percentile Rank
Calculate exactly where a specific value ranks within a dataset as a percentile.
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