Popular Calculators

Math & Geometry

Arc Length Calculator

Calculate the arc length of a circle using radius and central angle with this accurate, fast, and easy-to-use Arc Length Calculator.

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Math

Area Calculator

Use this free Area Calculator to find circle, square, rectangle, triangle, trapezoid, ellipse, and parallelogram area quickly.

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Unit Converters

Area Unit Converter

Use this Area Unit Converter to convert square meters, acres, hectares, square feet, square miles, and more instantly online.

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Math

Arithmetic Sequence Calculator

Calculate the nth term, common difference, sequence terms, and sum of an arithmetic sequence instantly with formulas, examples, and FAQs.

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Vehicle and Practical Calculators

arv calculator

Use this ARV Calculator to estimate after repair value, repair costs, profit margin and max offer for a rental or fix-and-flip deal.

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Data Converter

ASCII Converter

Convert text to ASCII and ASCII to text instantly with decimal, binary, hex, and octal outputs for coding and data tasks.

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Construction and Home

Asphalt Calculator

Estimate asphalt area, volume, weight, tons, waste, truckloads, and material cost for driveways, roads, parking areas, or custom paving projects.

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Finance

attendance calculator

Thousands of free online calculators and converters for math, finance, health, science, and everyday life. Fast, accurate, and always free.

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Date and Time

audiobook speed calculator

Calculate audiobook listening time at any playback speed, see time saved, and find the speed needed to finish by a target duration.

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Finance

Auto Loan Calculator

Use our Auto Loan Calculator to estimate monthly car payments, total interest, total loan cost, and compare auto financing options easily.

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Math

Average Calculator

Use our Average Calculator to find the mean of numbers instantly. Add values, calculate results, and understand averages with simple examples.

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Finance

Average Cost Basis Calculator

Calculate average stock cost basis across multiple purchases and fees. Estimate shares, investment, average cost per share, profit or loss, and ROI.

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Business & Ecommerce

Average Order Value Calculator

Calculate average order value from total revenue and orders. Compare your AOV with a target and estimate revenue per order, item, and target revenue.

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Age and Conversion Calculators

average percentage calculator

Calculate average percentages from marks, scores, or rates instantly with this free tool. Add values, get accurate results, and learn the formula.

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Business Calculators

Average Revenue Per User Calculator

Calculate ARPU, compare it with a previous period, measure percentage change, and estimate annualised revenue per user for your business.

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Finance

Balance Transfer Calculator

Use our balance transfer calculator to compare transfer fees, promotional APR interest, payoff time and potential savings against your current card.

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Real Estate and Lending

Balloon Loan Calculator

Estimate balloon loan payments, remaining balance, total interest, fees, loan-to-value ratio, and extra-payment savings with our free calculator.

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Data Converter

Base64 Decoder

Decode Base64 to text or file instantly with URL-safe support, data URI detection, MIME details, and copy-ready output.

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Data Converter

Base64 Encoder

Encode text and files to Base64 instantly with URL-safe output, data URI support, line wrapping, and copy-ready results.

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Construction

Baseboard Calculator

Calculate baseboard length, room perimeter, door deductions, waste allowance, stock pieces, joints, and estimated trim material cost.

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Electrical & Solar

Battery C-Rate Calculator

Calculate battery C-rate, charge or discharge time, power and energy from current, capacity and voltage with this free calculator.

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Electrical and Energy

Battery Capacity Calculator

Calculate required battery capacity in Ah, Wh, and kWh using load power, runtime, voltage, efficiency, depth of discharge, ageing, and reserve.

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Electrical and Energy

Battery Charge Time Calculator

Estimate battery charging time from capacity, voltage, starting charge, target charge, charger amps or watts, efficiency, and charging taper.

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Electrical & Solar

Battery Energy Calculator

Calculate battery energy in Wh and kWh from voltage, amp-hours, quantity, usable capacity and efficiency with runtime estimates.

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