CalculatorsHive – Free Online Calculators for Finance, Engineering, Health & More
CalculatorsHive is a free online calculator platform offering 250+ calculators for finance, engineering, health, construction, education, business, mathematics, science, and everyday calculations. No sign-up is required, and calculations run privately in your browser.
Advanced Finance Calculators
US & UK-optimised tools with real tax law, projection tables, and deep explanations
Mortgage vs Rent Calculator
Compare the full long-term cost of buying a home (mortgage, maintenance, opportunity cost, equity) against ren…
Use Free →Net Worth Calculator
Calculate your total net worth by entering your assets (home equity, investments, cash, retirement accounts, v…
Use Free →401(k) vs Roth IRA Calculator
Compare a Traditional 401(k) or IRA (pre-tax) against a Roth 401(k) or Roth IRA (post-tax). See exactly which …
Use Free →⭐ Most Popular Calculators
Trusted by users across the US and UK
401(k) Contribution Calculator
Calculate 401(k) growth with employee contributions and employer match. See total ann…
Use Free401(k) vs Roth IRA Calculator
Compare a Traditional 401(k) or IRA (pre-tax) against a Roth 401(k) or Roth IRA (post…
Use FreeAPR Calculator
Calculate the true Annual Percentage Rate (APR) of any loan, including fees. Compare …
Use FreeAge Calculator
Calculate your exact age in years, months, days, hours, and minutes. Find out how man…
Use FreeAmortization Calculator
Calculate a complete loan amortization schedule. See your monthly principal and inter…
Use FreeAustralian Income Tax Calculator
Calculate your Australian take-home pay after income tax, Medicare levy, and Low Inco…
Use FreeAuto Loan Calculator
Calculate your monthly car loan payment, total interest, and full cost of financing a…
Use FreeBMI Calculator
Calculate adult BMI categories and healthy weight range, or a child and teen BMI-for-…
Use FreeCanada Income Tax Calculator
Calculate Canadian take-home pay after federal and provincial income tax, CPP contrib…
Use FreeCapital Gains Tax Calculator
Calculate capital gains tax on stocks, property, and other assets. Covers US long-ter…
Use FreeCompound Interest Calculator
Calculate compound interest on any investment or savings account. See how money grows…
Use FreeDecanter Centrifuge Calculator
Calculate decanter centrifuge G-force, bowl tip speed, sludge dry-solids loading, cap…
Use FreeBrowse by Category
Find the right calculator for any task
Finance
86 tools
Health & Fitness
13 tools
Mathematics
13 tools
Education
13 tools
Automotive
17 tools
Business
8 tools
Engineering
20 tools
Conversion
24 tools
Statistics
8 tools
Geometry
8 tools
Date & Time
5 tools
Construction
8 tools
Cooking
4 tools
Developer Tools
6 tools
Science
6 tools
Real Estate
8 tools
Recently Added Calculators
Explore new tools added to CalculatorsHive
EV Charging Time Calculator
Estimate Charging Time by SOC and Charger PowerEV Charging Cost Calculator
Calculate Electricity Used and Charge CostEV Range Calculator
Estimate Electric Vehicle Driving RangeEV Running Cost Calculator
Cost per Kilometre and Monthly Electricity CostEV Home Charging Calculator
Estimate Home Charge Time, Energy, and CostSolar EV Charging Calculator
Size Solar Capacity for Daily EV DrivingEV Carbon Savings Calculator
Compare Driving Emissions with a Petrol CarEV Charger Sizing Calculator
Estimate Charger Power for an Available WindowFrequently Asked Questions
Why CalculatorsHive?
Built to be the calculator you actually trust
Verified Formulas
Every calculator uses industry-standard formulas — the same ones used by banks, the IRS, HMRC, and financial planners. We show the formula and explain the maths.
US & UK Precision
Finance calculators apply the correct rules for your country — US federal tax brackets, UK PAYE & NI, SDLT, CGT, ISA limits, and more. Not generic estimates.
Rich, Explained Results
Results include breakdowns, year-by-year projections, amortization schedules, and plain-English explanations — not just a single number.
Instant, No Friction
No login. No email. No paywall. Every calculator loads fast and works completely in your browser. Results appear in under a second.
Mobile-First Design
Every calculator is built for touchscreens first. Large tap targets, readable fonts, and layouts that work whether you're on a phone, tablet, or desktop.
Connected Calculators
Finance tools are built as a cluster - use the mortgage calculator, then jump to amortization, then refinance, then affordability. Each one links to the next logical tool.