Free Online Calculator Tools Fast, Free, and Secure

Top, fast, and best in class calculators for everyday tasks. Lifetime free and unlimited. No signup. Your information is 100% confidential and secure.

Fertilizer Calculator

Calculate N.P.K application rates by area and target nutrient needs for lawns, gardens, and crops.

Age Calculator

Get exact age in years, months, and days. Also see days until your next birthday.

Calorie Calculator

Estimate daily calorie needs using Mifflin,St Jeor. Customize by activity level and goals.

BMI Calculator

Check your Body Mass Index (BMI) and category with metric or imperial units.

BMR Calculator

Find your Basal Metabolic Rate (BMR) and daily energy expenditure.

Compound Interest Calculator

Project investment growth with compounding frequency and contributions.

Loan Calculator

Compute monthly payments, total interest, and amortization schedules.

Date Calculator

Add or subtract days, find days between dates, and calculate due dates.

IP Subnet Calculator

CIDR, subnet mask, host ranges, and usable IPs for IPv4 subnets.

Percentage Calculator

Find percentages, percentage increase/decrease, and part whole relationships.

Scientific Calculator

Advanced functions: exponents, roots, logs, trig, constants, and memory.

Math Equation Solver

Solve linear, quadratic, and polynomial equations step-by-step.

Algebra Math Solver

Simplify expressions, factor, expand, and solve algebra problems.

Trigonometry Calculator

Compute sine, cosine, tangent, angles, sides, and radian degree conversions.

Free calculator tools for everyone, everywhere

Fast, accurate, and privacy-first calculators for health, finance, math, and daily tasks. Top quality, best performance, and lifetime free unlimited use. No signup required and your information is 100% confidential and secure.

Works worldwide: United States, United Kingdom, Canada, Australia, India, Indonesia, Brazil, Mexico, Germany, France, Spain, Italy, Netherlands, UAE, Saudi Arabia, Japan, Philippines, Pakistan, Nigeria, South Africa, Vietnam, Thailand, Malaysia, Singapore, and more.

Popular tools include: BMI, BMR, Calorie, Age, Loan, Compound Interest, Percentage, Date, Scientific, Algebra, Equation Solver, Trigonometry, IP Subnet, and Fertilizer calculators.

Frequently asked questions

Are these calculators free and unlimited?

Yes. All tools are 100% free with unlimited usage and no signup.

Is my information private and secure?

Yes. We prioritize privacy and security. Your personal inputs are not stored and your data remains confidential.

Do the calculators work on mobile?

Absolutely. All tools work smoothly on phones, tablets, and desktops.

Which calculators are included?

Health (BMI, BMR, Calorie, Age), Finance (Loan, Compound Interest, Percentage), Math (Scientific, Algebra, Equation Solver, Trigonometry), and Utility (Date, IP Subnet, Fertilizer).

Can I share results?

Yes. You can copy results and share links to each tool for quick access.