Everyday Calculators & Tools
Handle quick everyday math, dates, conversions, cooking, work, travel, sizing, and small decisions. Every tool works locally without an account.
Percentage Calculator
Solve percentages, percentage change, and reverse percentages.
Tip & Bill Splitter
Calculate tips, totals, rounding, and equal shares.
Discount Calculator
Find sale prices, stacked savings, tax, and checkout totals.
Unit Price Comparison
Compare package prices using a shared quantity.
Age Calculator
Find exact age, total days, and the next birthday.
Date Difference
Count calendar, inclusive, and business days.
Time Duration
Calculate elapsed time, breaks, and decimal hours.
Unit Converter
Convert length, weight, temperature, area, volume, and speed.
Cooking Converter
Convert cooking volumes and weights.
Recipe Scaler
Scale ingredient quantities for different servings.
Random Picker
Select random items privately with browser cryptography.
Countdown Calculator
Track time until an event or elapsed since it.
Word Count & Reading Time
Count text and estimate reading duration.
Fuel Cost Calculator
Estimate trip fuel, cost per mile, and traveler shares.
Mileage Calculator
Calculate traveled miles and reimbursement.
Work Hours Calculator
Total shifts, breaks, overtime, and estimated pay.
Ratio Calculator
Simplify and scale equivalent proportions.
Fraction Calculator
Calculate, simplify, and convert fractions.
Roman Numeral Converter
Convert and validate standard Roman numerals.
Shoe Size Converter
Estimate US, UK, EU, and centimeter sizes.
Clothing Size Converter
Compare general international size ranges.
Sleep Time Calculator
Estimate bedtimes and wake times by cycle.
Pet Age Calculator
Estimate dog and cat human-age equivalents.
QR Code Generator
Create scannable codes locally in the browser.
Data Storage Converter
Convert bits, bytes, decimal, and binary units.
Small tools for common questions
Use the percentage, tip, discount, and unit-price tools while shopping or splitting expenses. Date, time, work-hour, mileage, and fuel calculators help with schedules and travel planning. Conversion and cooking tools keep units consistent, while text, random-selection, QR, and data-storage utilities handle quick tasks without uploading your input.
Clear assumptions and local calculation
Each page explains its formula or approximation and calls out important limitations. Calculations occur in the current browser tab. Results are intended for practical planning; verify official rates, policies, product size charts, and high-stakes decisions with the relevant source.