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.
Body Frame Size Calculator
Calculate your body frame size using wrist circumference or height. Determine if you have small, medium, or large frame to find ideal weight range.
EBITDA Margin Calculator
Calculate EBITDA margin to measure operating profitability. Enter revenue and EBITDA to get your margin percentage and financial performance insights.
Sales Commission Calculator
Calculate sales commission instantly. Enter sales amount and commission rate to find earnings, total payout, net revenue, and commission tiers.
Price Elasticity Calculator
Calculate price elasticity of demand. Analyze how price changes affect quantity demanded and revenue. Get elasticity coefficient, classification, and pricing strategy.
Fabric Yardage Calculator
Calculate fabric yardage for sewing projects. Enter dimensions, fabric width, and pattern repeat to get accurate yards/meters needed with waste allowance.
Dollar Cost Averaging Calculator
Calculate dollar cost averaging strategy results. Enter amount, frequency, and periods to see average cost, total shares, return, and ROI analysis.
Garden Soil Calculator
Calculate garden soil needed for your project. Enter area and depth to get cubic yards, bags required, and cost comparison for topsoil, compost, and garden soil.
Break Even Calculator
Calculate break even with our comprehensive calculator. Get accurate results and detailed analysis for your specific needs.
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.