Convert correct/total answers to percentage and letter grade. Everything runs locally in your browser — nothing is uploaded.
Computes percentage values, percentage increases and decreases, and what-percent-of-what relationships with precise decimal arithmetic. Essential for everyday math — tips, discounts, tax rates, grade scores, and statistical comparisons where quick percentage answers are needed.
Convert percentage scores to letter grades. Enter your percentage to see the corresponding letter grade on standard scale. Everything runs locally in your browser — nothing is uploaded.
Calculate your final grade using weighted assignment scores. Enter grades and their weights to compute your overall percentage. Everything runs locally in your browser — nothing is uploaded.
Calculates gross margin percentage, markup percentage, cost, and selling price from any two known variables — perfect for retail pricing, wholesale negotiations, and e-commerce product listing optimization where you need to work backwards from a target margin.
Conversion Rate Calculator divides conversions by total visitors and displays the rate as a percentage with configurable decimal precision. Everything runs locally in your browser — nothing is uploaded.
Test Score Calculator lets you convert correct/total answers to percentage and letter grade. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Convert correct/total answers to percentage and letter grade. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Enter numeric values in the input fields — amounts, rates, or percentages.
Yes. After the initial page load, Test Score Calculator runs entirely on your device with no internet connection needed. All processing is done locally.
Yes, this tool is completely free with no usage limits, registration, or credit card required.
All processing happens locally in your browser. Your data is never uploaded to any server.
Yes. After the initial page load, the tool runs entirely offline without requiring an internet connection.
No. You can use this tool unlimited times with no quotas or restrictions.
Any modern web browser (Chrome, Firefox, Safari, Edge) on desktop or mobile. No installation needed.
Percentage Calculator
Computes percentage values, percentage increases and decreases, and what-percent-of-what relationships with precise decimal arithmetic. Essential for everyday math — tips, discounts, tax rates, grade scores, and statistical comparisons where quick percentage answers are needed.
Age Calculator
Computes exact age in years, months, days, hours, minutes, and seconds from a given birth date relative to any target date. Everything runs locally in your browser — nothing is uploaded.
ETA Calculator
Estimate travel time from distance and speed — with optional arrival time.
Study Time Calculator
Calculate total study hours over a period and see monthly projections.
Words Per Page Calculator
Estimate how many pages your word count will take at different font sizes.
Business Days Calculator
Count the number of business days between two dates, excluding weekends. Plan projects and track working days accurately. Everything runs locally in your browser — nothing is uploaded.