Utility calculators
Free unit converter, date difference, fuel cost, GPA, password strength, cooking and time zone calculators for daily life.
Unit Converter
Length, weight, and volume in one place.
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Date Difference Calculator
Days, weeks, months between dates.
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Age Calculator
Exact age in years, months, days.
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Time Zone Converter
Convert times between cities.
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Fuel Cost Calculator
Estimate trip fuel costs.
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GPA Calculator
US 4.0 scale, weighted by credits.
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Tip Split Calculator
Split a bill with tip across N people.
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Password Strength
Entropy and time-to-crack estimate.
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Discount Calculator
Sale price after % off, plus savings.
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Cooking Converter
Cups, tbsp, tsp, ml and fl oz.
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Sleep Cycle Calculator
Best bedtime & wake time by sleep cycles.
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Electricity Cost Calculator
Cost per day, month and year for any device.
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Travel Time Calculator
Trip duration from distance and speed.
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Screen Time Calculator
Hours, days and % of waking life on screens.
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