Free Professional Tools
Calculators for Every Industry
Trading, crypto, construction, restaurant, veterinary, automotive, trucking and more. Free. No sign-up. No install.
Black-Scholes Calculator
Price options using the Black-Scholes model. Get call/put prices and all Greeks instantly.
Calculate →Options Payoff Calculator
Visualize options payoff diagrams. Enter strike, premium, and type to see profit/loss at expiry.
Calculate →DCF Valuation Calculator
Calculate intrinsic stock value using discounted cash flow analysis with custom WACC and growth rates.
Calculate →Impermanent Loss Calculator
Calculate impermanent loss for DeFi liquidity pools. Compare LP vs. HODL returns instantly.
Calculate →DCA Calculator
Dollar-cost averaging simulator. See how recurring investments perform over time with custom amounts.
Calculate →Tokenomics Analyzer
Analyze token supply, FDV, market cap, inflation rate, and real yield for any crypto project.
Calculate →Concrete Calculator
Calculate cubic yards, number of bags, and estimated cost for slabs, footings, and columns.
Calculate →Lumber Calculator
Calculate board feet, total cost, and material lists for your lumber projects.
Calculate →Paint Calculator
How many gallons of paint do you need? Enter room dimensions, windows, doors, and coats.
Calculate →Food Cost Calculator
Calculate food cost percentage, profit margins, and ideal menu pricing for your restaurant.
Calculate →Tip Calculator
Calculate tip amount, total bill, and per-person split. Supports custom tip percentages.
Calculate →Chocolate Toxicity Calculator
Check if your dog is at risk. Enter weight, chocolate type, and amount eaten for instant assessment.
Calculate →OBD2 Code Lookup
Look up any OBD-II diagnostic trouble code. Get description, severity, symptoms, and common causes.
Look Up →Tire Size Calculator
Compare tire sizes. Calculate diameter, circumference, speedometer difference, and revolutions per mile.
Calculate →Cost Per Mile Calculator
Calculate your true cost per mile. Break down fixed costs, variable costs, and fuel for trucking operations.
Calculate →Percentage Calculator
Three modes: What is X% of Y, X is what % of Y, and percentage change from X to Y.
Calculate →Compound Interest Calculator
See how your money grows with compound interest, monthly contributions, and interactive growth chart.
Calculate →Salary Calculator
Enter any pay rate and instantly see hourly, weekly, biweekly, monthly, and annual conversions with tax estimates.
Calculate →Age Calculator
Exact age in years, months, days. Total days alive, next birthday countdown, zodiac, Chinese zodiac, and generation.
Calculate →Random Number Generator
Generate random numbers, roll dice (D4-D20), flip coins, and shuffle lists with fun animations.
Generate →Loan Calculator
Calculate monthly payments, total interest, and full amortization schedule for any loan type.
Calculate →Savings Goal Calculator
Set a target amount and timeline to calculate exactly how much to save per month with progress chart.
Calculate →Dog Food Calculator
Calculate daily food, calories, treats limit, and water needs based on weight, age, and activity level.
Calculate →Can My Dog Eat...?
Search 80+ foods to instantly check if they're safe, caution, or toxic for your dog.
Check Food →Dog Age Calculator
Convert dog years to human years using accurate breed-size formulas. Not just multiply by 7.
Calculate →Zodiac Sign Calculator
Enter your birthday to find your zodiac sign, element, ruling planet, and personality traits.
Discover →Zodiac Compatibility
Check love, friendship, and work compatibility between any two zodiac signs with detailed analysis.
Check Match →Numerology Calculator
Calculate your Life Path Number, Expression Number, Soul Urge, and Personal Year from your name and birthdate.
Calculate →Chinese Zodiac Calculator
Find your Chinese zodiac animal, element, personality traits, compatibility, and lucky numbers by birth year.
Find Animal →Betting Odds Converter
Convert American, Decimal, and Fractional odds. Includes implied probability, EV, and Kelly criterion.
Convert →Options Strategy Builder
Build and visualize multi-leg options strategies. Compare spreads, straddles, and more.
Build →Strategy Backtester
Backtest trading strategies against historical data. Compare moving average, RSI, and more.
Backtest →Portfolio Optimizer
Optimize asset allocation using the efficient frontier. Calculate Sharpe ratio and ideal portfolio mix.
Optimize →Roofing Calculator
Calculate roofing squares, shingles, and material costs. Supports multiple roof pitches.
Calculate →Drywall Calculator
Calculate drywall sheets, joint compound, and tape needed for walls and ceilings.
Calculate →Deck Calculator
Calculate decking boards, joists, posts, railing, and hardware for your deck project.
Calculate →Labor Estimator
Estimate labor hours and cost by trade for construction tasks. Crew size and scheduling.
Estimate →Project Budget Builder
Build complete construction estimates with materials, labor, overhead, and profit margins.
Build →Structural Calculator
Calculate beam spans, load capacity, and joist sizing for residential construction.
Calculate →Recipe Cost Calculator
Calculate per-serving cost for any recipe. Add ingredients, quantities, and get menu pricing.
Calculate →Vet Drug Dosing Calculator
Calculate medication dosages for dogs and cats by weight. Common veterinary drug reference.
Calculate →Parts Markup Calculator
Calculate auto parts markup from wholesale to retail. Set profit margins for repair shops.
Calculate →Sankey Diagram Builder
See how companies make money. Interactive Sankey diagrams for Apple, Google, Tesla, and more.
Explore →Mortgage Calculator
Calculate monthly mortgage payments with PITI breakdown, amortization chart, and affordability check.
Calculate →Cap Rate Calculator
Calculate capitalization rate for investment properties. Enter NOI and property value for instant results.
Calculate →BMI Calculator
Calculate your BMI, weight category, and ideal weight range. Supports imperial and metric.
Calculate →TDEE Calculator
Calculate total daily energy expenditure, BMR, and macro targets for weight loss or gain.
Calculate →One Rep Max Calculator
Estimate your 1RM using 6 proven formulas. Get percentage chart for training programming.
Calculate →Plate Calculator
Calculate which plates to load on each side of the barbell. Visual plate diagram included.
Calculate →Dental Anesthetic Dose
Calculate maximum safe anesthetic doses by patient weight. Lidocaine, articaine, and more.
Calculate →Life Insurance Calculator
Calculate how much life insurance coverage you need based on income, debts, and family size.
Calculate →Solar ROI Calculator
Calculate solar panel payback period, savings, and return on investment for your home.
Calculate →Plumbing Cost Estimator
Estimate plumbing project costs — bathroom remodel, repipe, water heater, fixture install.
Estimate →Mulch & Landscape Calculator
Calculate cubic yards, bags, and cost for mulch, gravel, topsoil, and compost.
Calculate →Gutter Cost Calculator
Estimate gutter installation cost — material, downspouts, guards, and labor.
Estimate →Pool Cost Estimator
Estimate swimming pool installation cost — inground, fiberglass, vinyl, add-ons.
Estimate →Macro Calculator
Calculate daily protein, carbs, and fat targets based on your TDEE and diet style.
Calculate →Pregnancy Due Date Calculator
Estimate your due date, current week, trimester, and key milestones.
Calculate →Sleep Cycle Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles.
Calculate →EV Charging Cost Calculator
Calculate charge time, cost per mile, and annual savings vs gas for any EV.
Calculate →Rent vs Buy Calculator
Compare total cost of renting vs buying over time. Find your break-even year.
Compare →Dog Walking Price Calculator
Estimate dog walking costs — per walk, weekly, and monthly by city and service type.
Calculate →Wedding Budget Calculator
Plan your wedding budget with smart category allocation by region and guest count.
Plan →Moving Cost Estimator
Estimate moving costs — local vs long distance, packing, special items, DIY comparison.
Estimate →Electricity Bill Calculator
Add appliances and see which ones cost the most. Estimate your monthly electricity bill.
Calculate →Debt Payoff Calculator
Compare avalanche vs snowball strategies. See payoff dates and total interest saved.
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