Free Online Calculators

Free online calculators for finance, math, health, date & time, and more—instant answers with clear steps, formulas, and examples.

Mortgage Calculator Compound Interest Percentage Calculator Triangle Calculator Standard Deviation Time Calculator GPA Calculator BMI Calculator

Financial Calculators

All the money math in one place—mortgages, loans, interest, and payments—with clear visuals and schedules.

Mortgages & Loans

Interest & Payments

Budgeting & Planning

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Tip Calculator
Split the bill and apply tip pre/post-tax.

Fitness & Health Calculators

Macros, calories, BMR, TDEE, BMI, body fat, ideal weight, and target heart rate—quick estimates with clear guidance.

Body Metrics

Energy & Nutrition

Heart & Training

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Target Heart Rate
Training zones by age and intensity.

Math Calculators

Percentages, fractions, statistics, and scientific mode—everyday math done right.

Percentages & Ratios

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Percentage Calculator
Percent of, what percent, and change.

Fractions & Rational

¼
Fraction Calculator
Add, subtract, multiply, divide, simplify.

Statistics

σ
Standard Deviation
Population or sample with steps.

Scientific & General

Geometry Calculators

Triangles and plane shapes with visuals and formula steps.

Triangles

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Triangle Calculator
Solve sides, angles, area, and radii.

Plane Shapes (2D)

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Area Calculator
Areas for rectangles, circles, triangles, more.

Date & Time Calculators

Compute time between, add/subtract durations, and calculate age—with clean steps.

Dates

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Date Calculator
Add or subtract days, months, years.

Times & Durations

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Time Calculator
Between times or add/subtract durations.

Age

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Age Calculator
Exact age in years, months, days.

School Calculators

Grades and GPA with instant results and clear breakdowns.

Grades & GPA

Recently added

Tip Calculator — split bills with pre/post-tax options.
Grade Calculator — targets & weighted categories.
Area Calculator — areas for common 2D shapes.

What is Solverly?

Fast, accurate calculators for everyday decisions—plus optional guidance that explains your result and suggests next steps.

Why people use Solverly

Powerful calculators for real-life decisions—mortgages and debt payoff, calories and macros, percentages and unit conversions, concrete and paint estimates, and more. Get clear results fast, understand what they mean, and explore next steps with optional guidance.