Estimate travel time from distance and speed — with optional arrival time. 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.
Calculate the area and perimeter of a rectangle from length and width. Simple geometry for construction, design, and planning. Everything runs locally in your browser — nothing is uploaded.
Calculate the aspect ratio from width and height dimensions. Find the simplified W:H ratio for images, videos, and screens. Everything runs locally in your browser — nothing is uploaded.
Expression evaluator with keypad and history, ETA calculator with distance and speed, and a stopwatch/chronometer with lap recording.
Speed up or slow down any video. Adjust playback speed from 0.1x to 10x with audio pitch preservation. Perfect for creating time-lapses, slow-motion replays, and quick reviews.
ETA Calculator lets you estimate travel time from distance and speed — with optional arrival time. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Estimate travel time from distance and speed — with optional arrival time. 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, ETA 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.
Study Time Calculator
Calculate total study hours over a period and see monthly projections.
Test Score Calculator
Convert correct/total answers to percentage and letter grade.
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.