CalculatorsHive – Free Online Calculators for Finance, Engineering, Health & More
CalculatorsHive is a free online calculator platform 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
The calculators people search for most worldwide
Mortgage Calculator
Calculate your monthly mortgage payment, total interest cost, and full loan breakdown…
Use FreePercentage Calculator
Calculate percentages, percentage increase/decrease, what percent of a number, and mo…
Use FreeMonthly Investment Calculator
Calculate the future value of regular monthly investments using dollar-cost averaging…
Use FreeBMI Calculator
Calculate adult BMI categories and healthy weight range, or a child and teen BMI-for-…
Use FreeCalorie Calculator
Calculate your daily calorie needs based on age, weight, height, gender, and activity…
Use FreeGPA Calculator
Calculate your GPA (Grade Point Average) for the semester or cumulative. Supports 4.0…
Use FreeCurrency Converter
Convert USD, EUR, GBP, JPY, CAD, AUD, CHF, INR, CNY, SGD and AED using the latest dai…
Use FreePaycheck Calculator
Calculate your exact US take-home pay for any pay period — hourly, weekly, biweekly…
Use FreePregnancy Due Date Calculator
Calculate your pregnancy due date using Naegele rule from your last menstrual period.…
Use FreeOvulation Calculator
Calculate your estimated ovulation date and fertile window based on your last menstru…
Use FreeCompound Interest Calculator
Calculate compound interest on any investment or savings account. See how money grows…
Use FreeScientific Calculator
Free online scientific calculator with trigonometric functions, logarithms, exponents…
Use FreeBrowse by Category
Find the right calculator for any task
Finance
85 tools
Health & Fitness
13 tools
Mathematics
13 tools
Education
13 tools
Automotive
17 tools
Business
8 tools
Engineering
51 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
STP & ETP
40 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.