Professional Online Calculators
Comprehensive collection of free online calculators for every need. From basic arithmetic to advanced financial planning tools.
Calculator Categories
Find the perfect calculator for your needs. Browse our comprehensive collection organized by category.
Health & Medical
Health, fitness and medical calculation tools
Math & Science
Mathematical and scientific calculations
Finance & Investment
Financial planning and investment tools
Daily Life Tools
Everyday calculations and utilities
Unit Converters
Convert between different units and currencies
Business & Professional
Professional business calculation tools
Popular Calculators
Most used calculators by our users. Quick access to the tools you need most.
Auto Refinance Calculator
Calculate auto refinance savings, break-even months, and monthly payment. Compare current vs new terms and decide if refinancing is worthwhile.
Florida Paycheck Calculator
Calculate your take-home pay in Florida with no state income tax
Lead Time Calculator
Get accurate lead time calculations, reorder points, and safety stock recommendations to streamline your supply chain operations.
BMR Calculator
Calculate your Basal Metabolic Rate and daily calorie needs for optimal nutrition and fitness goals
Mortgage Calculator
Calculate monthly mortgage payments and amortization
Temperature Converter
Convert temperatures between Fahrenheit, Celsius, Kelvin, and Rankine with instant live conversion. Perfect for science, cooking, and weather.
Body Fat Calculator
Calculate body fat with US Navy method using neck, waist, and hip (women) measurements. See category, fat/lean mass, unit options, and measurement tips.
ACFT Score Calculator
Calculate your Army Combat Fitness Test (ACFT) score with our official calculator. Get detailed results for all 6 events, performance analysis, and training recommendations.
Latest Calculators
Discover our newest calculation tools. Fresh additions to help you with your latest needs.
Long Multiplication Calculator
Perform long multiplication step by step with partial products and carry explanations. Enter two integers to see aligned steps and the final product.
Palworld Breeding Calculator
Ultimate Palworld breeding calculator and guide. Calculate optimal Pal combinations, predict offspring, analyze skill inheritance, and plan perfect breeding strategies for Palworld.
Corrected Calcium Calculator
Calculate corrected calcium levels using total calcium and albumin values. Get accurate clinical interpretation and recommendations for calcium metabolism assessment.
MME Calculator
Calculate mme calculator with our professional calculator
Belt Size Calculator
Calculate belt size from waist measurement. Convert inches to cm, find US/EU/UK belt sizes, and get the perfect fit with our comprehensive sizing guide.
Dave Ramsey Investment Calculator
Calculate dave ramsey investment with our professional calculator
Florida Property Tax Calculator
Calculate your Florida property tax with homestead exemptions and county millage rates. Get accurate estimates for Miami-Dade, Broward, Orange counties.
Auto Refinance Calculator
Calculate auto refinance savings, break-even months, and monthly payment. Compare current vs new terms and decide if refinancing is worthwhile.
Why Choose LumoCalculator?
Professional, accurate, and easy-to-use calculators for all your needs.
100% Free
All calculators are completely free to use. No hidden fees or subscriptions.
Privacy First
Your data stays on your device. We don't store or track your calculations.
Mobile Friendly
Optimized for all devices. Use our calculators on desktop, tablet, or mobile.
Frequently Asked Questions
Got questions? We've got answers. Find quick solutions to common queries about our calculators.