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CalcRiver

Everyday Life

Useful tools for time, age, and daily planning.

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Salary Calculator

Convert your salary between hourly, weekly, bi-weekly, monthly, and annual pay. See your gross income breakdown.

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Income Tax Calculator

Estimate your 2024 Federal Income Tax. Calculate effective tax rate, tax brackets, and take-home pay based on filing status.

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Currency Calculator

Convert between major world currencies (USD, EUR, GBP, JPY, etc.). Instant exchange rate estimates for travelers and shoppers.

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Zakat Calculator

Calculate your annual Zakat (2.5%) based on your assets, gold, savings, and liabilities. Supports custom Nisab thresholds.

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Password Generator

Create strong, secure passwords instantly. Customize length and characters to protect your accounts.

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Dice Roller

Roll virtual dice instantly. Supports D6, D20, D100 and custom sides. Perfect for board games, D&D, and math.

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Random Number Generator

Generate random numbers and lists.

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Day Counter

Calculate the number of days between two dates. Counts business days, weekends, and total duration.

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Shoe Size Conversion

Convert shoe sizes between US, UK, EU, and CM. Accurate charts for Men and Women.

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Day of the Week Calculator

Find the day of the week for any date. Check what day you were born, or find out what day a future event falls on.

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Dew Point Calculator

Calculate dew point temperature and comfort level from relative humidity and air temperature.

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Wind Chill Calculator

Calculate the "feels like" temperature and frostbite risk based on wind speed and air temperature.

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Heat Index Calculator

Calculate what the temperature really feels like based on relative humidity. Uses NOAA formulas.

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Gas Mileage Calculator

Calculate your car's MPG (Miles Per Gallon). Enter odometer readings or distance and fuel to track efficiency.

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Weight Calculator

Convert between weight units like Kilograms (kg), Pounds (lbs), Stones (st), and Ounces. Instant conversion for health and cooking.

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Tip Calculator

Calculate gratuity and split the bill between any number of people. Fast and easy tipping.

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Love Calculator

Test the compatibility between two names. Find out your love score percentage and relationship forecast.

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Time Card Calculator

Calculate weekly work hours and gross pay. Track daily clock-in/out times, breaks, and overtime automatically.

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Fuel Cost Calculator

Calculate the total cost of gas or diesel for a trip. Estimate fuel needed based on distance and MPG.

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Bra Size Calculator

Find your perfect bra fit. Calculate US, UK, and EU sizes based on your band and bust measurements.

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Grade Calculator

Calculate your current class grade and what you need on the final exam. Supports weighted percentages and point-based grading.

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Hours Calculator

Calculate total work hours for payroll or timesheets. Sum multiple time intervals and calculate gross pay with overtime support.

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Date Calculator

Add or subtract days, weeks, months, and years from a date. Calculate the exact duration between two dates.

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Bandwidth Calculator

Calculate download time for files or data transfer speed. Convert between Mbps, MB/s, and GB instantly.

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Sleep Calculator

Calculate the best times to go to bed or wake up based on 90-minute sleep cycles.

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Tire Size Calculator

Compare two tire sizes. Check speedometer error, diameter difference, and sidewall height changes.

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Golf Handicap Calculator

Calculate your World Handicap System (WHS) index. Track differentials for up to 20 rounds of golf.

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Mileage Calculator

Calculate gas mileage (MPG) and estimate fuel costs for trips.

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Basic Calculator

Simple online calculator.

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Conversion Calculator

Convert length, weight, volume, temperature, and more.

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Time Zone Calculator

Convert time between cities and zones. Check local times worldwide.

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GPA Calculator

Calculate college or high school GPA.

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Fraction Calculator

Add, subtract, multiply, and divide fractions.

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Average Calculator

Calculate the mean, median, and sum of a data set.

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Standard Deviation

Calculate sample and population SD.

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Time Calculator

Add or subtract hours/minutes to time. Calculate duration.

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Age Calculator

Calculate precise age.

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Time Difference

Duration between times.

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Mulch Calculator

Calculate how much mulch you need in cubic yards and bags. Estimate costs for flower beds and landscaping.

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BTU Calculator

Calculate the required BTU capacity for air conditioners or heaters based on room size and insulation.

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Electricity Calculator

Calculate electricity costs for any appliance. Estimate daily, monthly, and yearly energy bills based on power consumption (Watts).

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Roman Numeral Converter

Convert numbers to Roman numerals and back. Learn the symbols (I, V, X, L, C, D, M) and rules.

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Speed Calculator

Calculate Speed, Distance, or Time. Convert between mph, kph, m/s, and knots.

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Height Calculator

Predict a child's future adult height.

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IP Subnet Calculator

Calculate network, broadcast, and host ranges.