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MPH to KMH
Convert between miles per hour and kilometers per hour. Includes pace, distance, and travel time calculators.
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Date & Time Format Converter
Convert and format dates and times across timezones, locales, and programming formats like ISO 8601 and Unix timestamps.
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BMI Calculator
Calculate your Body Mass Index by entering height and weight. Results shown with the WHO reference scale.
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BMR Calculator
Calculate your Basal Metabolic Rate and Total Daily Energy Expenditure. Map daily calories for weight loss or muscle gain.
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VAT Calculator
Add standard VAT to a net price or reverse-calculate tax from a gross receipt. Custom percentages or country presets.
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GPA Calculator
Calculate your high school or college GPA. Enter credits, letter grades, and AP/Honors class types for weighted and unweighted averages.
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Loan Calculator
Calculate monthly payments, total interest, and full amortization schedule for any type of loan.
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Compound Interest Calculator
Calculate how investments grow over time with monthly contributions, inflation adjustments, and visual charts.
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Percentage Calculator
Quick calculations for discounts, percentage change, and tip math. Covers "what is X% of Y" and all common formulas.
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Salary to Hourly Calculator
Convert your annual salary to equivalent hourly, daily, weekly, and monthly pay rates.
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Margin & Markup Calculator
Calculate profit margins, markup percentages, and optimal pricing from cost and selling price.
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Electricity Cost Calculator
Calculate the power consumption of any appliance. Enter wattage, daily use, and kWh rate for daily, monthly, and yearly cost.
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Unit Price Calculator
Compare price per unit across two products. Find the best value per ounce, gram, liter, or item instantly.
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Age Calculator
Enter your date of birth to see your exact age in years, months, days, hours, and minutes.
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Days Between Dates
Calculate the exact number of days, weeks, and months between any two dates.
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Tip Calculator
Calculate tip amounts and split the total bill evenly between any number of people. Choose preset or custom tip rates.
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Imperial to Metric
Convert between imperial and metric units for length, weight, volume, temperature, and area. Instant two-way conversion.