Free Calculators and Practical Tools from Lyquid
Calculate payments, dates, grades, health metrics, conversions, and business documents without clutter.
Free Tools
Free online calculators
Financial Calculators
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Financial
Mortgage Calculator
Estimate principal, interest, taxes, insurance, HOA dues, and full loan cost for a home purchase.
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Financial
Loan Calculator
Calculate loan payments and see how extra monthly principal changes payoff time and interest.
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Financial
Auto Loan Calculator
Model monthly payments, reverse-solve your budget, and inspect the full cost of a car deal.
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Financial
Interest Calculator
Project compound interest with recurring deposits and a selectable compounding schedule.
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Financial
Payment Calculator
Solve the periodic payment needed for a loan, savings goal, or future-value target.
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Financial
Retirement Calculator
Estimate retirement readiness by comparing projected savings to an income need in retirement.
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Financial
Amortization Calculator
Build a fast payoff summary with first-payment detail and extra-payment impact.
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Financial
Investment Calculator
Forecast investment growth, contributions, target progress, and required monthly savings.
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Financial
Inflation Calculator
Estimate how inflation changes future prices and today's purchasing power.
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Financial
Finance Calculator
Solve common time-value-of-money variables for loans, investments, and annuities.
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Financial
Income Tax Calculator
Estimate U.S. federal income tax, refund, or amount owed using 2025 and 2026 federal brackets.
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Financial
Compound Interest Calculator
Calculate compound growth with deposits and a clear split between principal, contributions, and interest.
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Financial
Salary Calculator
Convert pay frequencies, estimate hourly value, and approximate take-home pay.
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Financial
Interest Rate Calculator
Solve the implied APR from loan amount, monthly payment, and term.
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Financial
Sales Tax Calculator
Add or reverse sales tax with discounts and a clean before/after breakdown.
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Free online calculators
Fitness & Health Calculators
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Fitness & Health
BMI Calculator
Calculate BMI, category, and a healthy-weight range from height and weight.
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Fitness & Health
Calorie Calculator
Estimate maintenance calories and goal calories using BMR and activity level.
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Fitness & Health
Body Fat Calculator
Estimate body fat percentage with the U.S. Navy tape-measure method.
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Fitness & Health
BMR Calculator
Estimate basal metabolic rate and maintenance calories from body measurements.
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Fitness & Health
Ideal Weight Calculator
Compare common ideal-weight formulas and a BMI-based healthy range.
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Fitness & Health
Pace Calculator
Convert race time and distance into pace and speed across miles and kilometers.
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Fitness & Health
Pregnancy Calculator
Estimate due date, conception date, and trimester milestones from last menstrual period.
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Fitness & Health
Pregnancy Conception Calculator
Estimate conception date and likely fertile window from an expected due date.
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Fitness & Health
Due Date Calculator
Calculate pregnancy due date from last period, conception date, or IVF transfer date.
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Free online calculators
Math Calculators
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Math
Scientific Calculator
Evaluate a scientific expression with common functions and degree/radian angle modes.
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Math
Fraction Calculator
Add, subtract, multiply, or divide fractions with reduced and decimal results.
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Math
Percentage Calculator
Solve common percentage phrases, percentage change, and reverse-percentage questions.
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Math
Random Number Generator
Generate random integers or decimals with count, range, decimal precision, and uniqueness options.
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Math
Triangle Calculator
Solve area, perimeter, and angles from three side lengths.
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Math
Standard Deviation Calculator
Compute mean, variance, standard deviation, min, max, and count from a dataset.
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Free online calculators
Other Calculators
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Other
Age Calculator
Calculate exact age, total days lived, and next birthday from two dates.
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Date Calculator
Find the difference between dates and add calendar or business days.
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Time Calculator
Calculate elapsed time between clock times with breaks and optional rounding.
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Hours Calculator
Total weekly work hours, overtime, and gross pay from daily hour entries.
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GPA Calculator
Calculate weighted GPA from course credits and letter grades.
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Grade Calculator
Find the final exam score needed for a target course grade and preview projected grade.
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Concrete Calculator
Estimate concrete volume, waste, bag count, and material cost for slabs or round columns.
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Subnet Calculator
Calculate network address, mask, broadcast, host range, and usable host count.
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Password Generator
Generate strong passwords with character-set controls and ambiguity filtering.
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Conversion Calculator
Convert common length, weight, temperature, and volume units in one tool.
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Latest Resources
View AllFinanceApr 2, 2026
Business valuation is part math, part context. Here's how to think about valuing a company, which methods investors and buyers use most often, and why the right number depends on the type of business you run.