Free online tools
Math & Calculators
Explore 9 Math & Calculators tools and finish common tasks quickly in your browser.
Taiwan Salary & Labor/Health Insurance Calculator (2026)
Calculate Taiwan monthly take-home pay (Net Pay), Labor Insurance (勞保), National Health Insurance (健保), and Labor Pension (勞退) contributions using official 2026 (ROC Year 115) government grade tables.
Taiwan Receipt Lottery Checker (統一發票)
Check Taiwan Uniform Invoice lottery (統一發票) winning numbers. Features instant 3-digit quick match, 8-digit prize calculation, and historical records synced with the Ministry of Finance.
Random Picker & Wheel of Fortune
Enter list items to spin a colorful lucky wheel and pick winning slots instantly.
Date Calculator: Days Between Dates, Add Days, Countdown
Free date calculator: count the days between two dates, add or subtract days from any date (for example 100 days from today), and build a live countdown timer.
TDEE & BMR Calculator
Estimate your Body Mass Index (BMI), Basal Metabolic Rate (BMR), and Total Daily Energy Expenditure (TDEE) with macro nutrient suggestions.
Simple & Compound Interest Calculator
Simulate lump-sum deposits or monthly regular investments, support custom compounding frequencies, and plot interest growth charts.
Percentage, Discount & Percent Change Calculator
Calculate percentages, ratios, percentage increases or decreases, price changes, discounts, savings, and final totals with formulas.
Fraction to Decimal & Percentage Converter
Instantly convert between fractions, decimals, and percentages, showing simplification steps, reciprocal, and interactive pie charts.
Mortgage & Loan Interest Calculator
Calculate amortizations for equal payment or equal principal plans instantly with grace period support, pie charts, and payment schedule tables.
