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Sun Exposure Seat Finder
Find the best side to sit on a bus to avoid direct sunlight or find the sun side based on your travel route.
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21 tools available
Free online calculators for everyday math, finance, health, and more.
Personal Carbon Calculator
Calculate your annual carbon footprint and model reduction scenarios (switching to EV, going vegetarian, installing solar) to see your potential CO2 offsets.
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3D Printing Cost Calculator
Calculate 3D printing costs including material, labor, electricity, and machine wear. Get instant suggested pricing models for commercial printing quotes.
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Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
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AI Token & API Cost Estimator
Estimate API costs for GPT-4, Claude 3, and Gemini. Calculate token usage based on text length and compare pricing models for your AI projects.
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BMI Calculator - Metric & Imperial, Healthy Weight Range
Calculate your Body Mass Index with metric (kg/cm) or imperial (lbs/ft) units. See your BMI category, visual gauge, and healthy weight range for your height.
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Calorie Calculator
Estimate your daily caloric needs for weight maintenance, loss, or gain based on Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle formulas.
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Etsy Fee & Profit Calculator
Calculate Etsy seller fees, transaction fees, payment processing fees, and net profit. Plan listing prices and breakeven margins for your shop.
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EV Range Calculator - Electric Vehicle Range Estimator
Calculate how far your electric vehicle can travel on a single charge. Enter battery capacity, efficiency, and driving conditions to get an accurate range estimate.
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Freelance Rate & Project Quote Calculator
Calculate your ideal freelance hourly rate and project quotes. Account for taxes, expenses, and desired profit margins with our comprehensive, privacy-focused calculator.
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Freelancer & Gig Economy Tax Estimator
Estimate your self-employment taxes, income taxes, and recommended quarterly payments. Supports US states, UK, Germany (DE), France (FR), and Canada (CA) client-side.
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Golf Simulator Space Calculator
Calculate the ideal room dimensions, screen size, aspect ratio, safety clearance, and projector placement for your home golf simulator.
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Height Comparison Calculator
Visually compare the heights of up to 20 people, characters, or objects side-by-side with a dynamic scale chart. Calculate height differences instantly.
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Hours Calculator
Add up work hours, calculate time sheet duration between two times, deduct unpaid breaks, and estimate gross earnings instantly.
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Image DPI & Print Size Calculator
Calculate print size in inches or centimeters from pixels and DPI, or find the pixel resolution needed to print standard sizes at 300 DPI.
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Percentage Calculator
Calculate percentages, percentage increase/decrease, and find what percent one number is of another. Free online percentage tool.
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Solar Panel Angle Calculator
Calculate the optimal tilt angle and orientation (azimuth) for solar panels based on your latitude. Includes seasonal adjustments for summer, winter, and year-round performance.
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Solar Panel Roof Estimator
Estimate how many solar panels can fit on your roof based on roof dimensions, slope pitch, panel layout orientation, and safety setbacks. Calculate system size in kW.
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Square Footage Calculator
Calculate square footage for rooms, yards, flooring, or any area. Supports rectangle, L-shape, circle, and triangle configurations with cost estimation and wastage parameters.
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Subscription Tracker & Savings Calculator
Track your monthly subscriptions and visualize your total annual spending. Identify "hidden" costs and discover how much you could save by cutting unused services.
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Test Grade Calculator
Calculate test percentages and letter grades instantly. Features an interactive easy grader table, custom grade scales, and weighted grade mode.
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