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Basic Calculator
Instant arithmetic with keyboard support. For specialized tools, open a focused page from the other tabs.
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Keyboard: 0-9, +, -, *, /, Enter, Backspace
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Financial Calculators
Open a focused page for loans, mortgages, interest, investing, tax, and more. Each page has its own inputs and explanations.
16 tools
Finance
Loan Calculator
Monthly payment, total interest, and payoff overview.
Open tool FinanceMortgage Calculator
Estimate payment from price, down payment, rate, and term.
Open tool FinanceCompound Interest
Growth with annual / monthly / daily compounding.
Open tool FinanceSimple Interest
Principal x rate x time for basic interest math.
Open tool FinanceInvestment Calculator
Project savings with monthly contributions.
Open tool FinanceRetirement Calculator
Project nest egg from savings and contributions.
Open tool FinanceAmortization
See principal vs interest over the loan term.
Open tool FinanceInflation Calculator
What today's money is worth in N years.
Open tool FinanceIncome Tax
Progressive tax estimate with standard deduction.
Open tool FinanceSalary Calculator
Hourly wage to weekly / monthly / annual pay.
Open tool FinanceInterest Rate Finder
Back-solve APR from payment and term.
Open tool FinanceSales Tax
Add tax to a purchase amount.
Open tool FinanceTip Calculator
Tip amount and split bill by people.
Open tool FinanceDiscount Calculator
Sale price after a percent off.
Open tool FinanceAuto Loan
Car payment estimates with term and rate.
Open tool Finance401(k) Calculator
Retirement contribution growth projection.
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Health Calculators
BMI, calories, body composition, pace, and pregnancy tools — each on a dedicated page.
8 tools
Health
BMI Calculator
Body mass index with category guidance.
Open tool HealthCalorie Calculator
Daily calorie needs by activity level.
Open tool HealthBMR Calculator
Basal metabolic rate estimate.
Open tool HealthBody Fat
Body fat % from common measurements.
Open tool HealthIdeal Weight
Healthy weight range by height.
Open tool HealthPace Calculator
Running pace from distance and time.
Open tool HealthPregnancy Due Date
Estimate week and due date from LMP.
Open tool HealthConception Calculator
Estimate conception window from due date.
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Math Calculators
Scientific functions, percentages, fractions, equations, statistics, and AI step-by-step help.
12 tools
Math
Scientific Calculator
Roots, powers, trig, and logs.
Open tool AIAI Math Solver
Step-by-step solutions for written problems.
Open tool MathEquation Solver
Solve common equations with brief steps.
Open tool MathPercentage Helper
A is what % of B, and related ratios.
Open tool MathPercentage Calculator
Percent of, change, increase, decrease.
Open tool MathFraction Calculator
Add, subtract, multiply, divide fractions.
Open tool MathBase Converter
Binary, decimal, and hex conversion.
Open tool MathStandard Deviation
Mean and spread for a data set.
Open tool MathTriangle Calculator
Area and perimeter from three sides.
Open tool MathCircle Calculator
Circumference, area, diameter from radius.
Open tool MathRandom Number
Generate integers or decimals in a range.
Open tool MathGPA Calculator
Weighted GPA from credits and grades.
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Utility Tools
Unit conversion, dates, GPA, passwords, networking, and everyday helpers.
18 tools
Utility
Unit Converter
Length, weight, and temperature.
Open tool UtilityDate Difference
Days between two dates.
Open tool UtilityDate Calculator
Add or subtract days from a date.
Open tool UtilityAge Calculator
Exact age from birth date.
Open tool UtilityTime Calculator
Add or subtract HH:MM:SS values.
Open tool UtilityWork Hours
Hours worked minus break.
Open tool UtilityGrade Calculator
Score earned vs total possible.
Open tool UtilityPassword Generator
Strong random passwords in-browser.
Open tool UtilitySubnet Calculator
Network range from IP + CIDR.
Open tool UtilityWord Counter
Words, characters, and lines.
Open tool UtilityFuel Economy
km/L and L/100km from trip data.
Open tool UtilityConcrete Calculator
Volume from length x width x depth.
Open tool UtilityMath Reference
Quick constants and input tips.
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Start on this page, then open a dedicated calculator when you need more depth. Most tools run locally in your browser.
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What is CalcSolver?
Free online calculators for finance, health, math, and everyday utilities — no signup, runs in your browser.
Students
Equations, units, GPA, and homework helpers.
Health
BMI, calories, and body metrics.
Daily tools
Percent, unit converter, dates & passwords.