Calculators

Calculators 117

• Invoice Tax Breakdown Calculator, Split any invoice into subtotal, tax, and total, per line item.
• Compound Interest & Loan Amortization Calculator, See compound growth or a full loan amortization schedule.
• Aspect Ratio Calculator, Find the matching dimensions for any aspect ratio.
• Global Time Zone Meeting Planner, Schedule meetings across time zones with one glance.
• Blog Reading Time Estimator, How long does it take to read this?
• Tip & Bill Splitter Calculator, Split the bill and tip fairly between friends.
• Calculate Salary to Hourly Rate Online: Free Calculator, Calculate salary to hourly rate online with custom work hours & paid time off.
• Retail Discount & Markup Pricing Calculator, Nail pricing with discounts and markups.
• Compound Inflation Purchasing Power Calculator, What will money be worth in the future?
• Percentage Calculator – Percentage Increase, Decrease & Difference, Calculate percentage increase, decrease, difference, and fraction of total instantly.
• Fuel Cost & Trip Mileage Calculator, Price out a road trip before you leave.
• BMI & Daily Calorie Intake Calculator, Track BMI and daily calorie needs.
• Daily Water Intake Calculator, How much water should you drink?
• Age Calculator: Date to Date Calculator, Day Counter & Calculate Age, Calculate your exact age, count days between dates, and compute calendar dates.
• Date-to-Date Duration Calculator, Exact days, weeks, and months between two dates.
• Add/Subtract Days From Date Tool, Jump forward or back to a future or past date.
• Business / Working Days Calculator, Count Monday-to-Friday working days only.
• Countdown Timer Generator, Ticking countdown to a launch or event.
• Stopwatch & Lap Timer, High-precision browser stopwatch with lap splits.
• Random Number Generator (Range), Crypto-random numbers between custom bounds.
• Even/Odd Number Filter, Split a list of digits into evens and odds.
• Fraction-to-Decimal Converter, Turn fractions into clean decimals, instantly.
• GCD & LCM Calculator, Greatest Common Divisor and Least Common Multiple.
• Quadratic Equation Solver, Solve ax² + bx + c = 0 with steps.
• Pythagorean Theorem Calculator, Solve right-triangle side lengths with a² + b² = c².
• Circle Area & Circumference Calculator, Area, circumference, radius, and diameter from one input.
• Triangle Area Calculator, Area via base/height or three sides (Heron's formula).
• Matrix Addition & Multiplication Tool, Add and multiply matrices client-side.
• Roman Numeral ↔ Arabic Converter, Translate XLII to 42 and back.
• Simple Interest Calculator, Principal, rate, and time interest in seconds.
• Unit Price Comparison Calculator, Compare price per gram, ml, oz, or item.
• Recipe Scale & Portion Converter, Scale ingredients up or down by servings.
• Paint Coverage & Wall Area Calculator, Estimate paint cans from wall size.
• Tile & Grout Calculator, Tiles, boxes, adhesive, and grout needed.
• Concrete, Gravel & Mulch Calculator, Volume or bags by area and depth.
• Wallpaper Roll Estimator, Rolls needed with pattern repeat.
• Flooring & Carpet Area Calculator, Square feet/metres with waste allowance.
• Sleep Cycle Bedtime Calculator, Best bedtime or wake time.
• Running Pace & Split Calculator, Pace, time, and distance splits.
• Heart Rate Zone Calculator, Training zones from age and resting HR.
• One-Rep Max & Plate Loader, Estimate 1RM and plates per side.
• Macro & Protein Split Calculator, Calories into protein/carbs/fat.
• Body Fat Estimate (Tape Method), Simple circumference-based estimate.
• Ideal Weight Range Calculator, Healthy weight range by height.
• Steps to Calories Calculator, Steps to estimated calories burned.
• Electricity Cost Calculator, Watts x hours x electricity rate.
• EV Charging Cost Calculator – Electric Car Charging Cost, Calculate electric vehicle (EV) charging cost for home & public chargers.
• Solar Payback Estimator, Simple payback by usage and rate.
• Carbon Footprint Quick Estimator, Travel, home, and diet estimate.
• Debt Payoff Snowball Calculator, Order debts by balance.
• Savings Goal Timeline Calculator, Monthly saving needed for a goal.
• Budget 50/30/20 Splitter, Needs, wants, savings.
• Rent Affordability Calculator, Income to rent range.
• Overtime & Shift Pay Calculator, Regular, overtime, and differential.
• Commission & Bonus Calculator, Base pay plus commission tiers.
• Freelance Rate Calculator, Desired income to hourly rate.
• Meeting Cost Calculator, Attendees x time x hourly rate.
• Coffee Ratio Calculator, Grams coffee to water.
• Pizza Dough Calculator, Dough by number, size, and style.
• Sourdough Hydration Calculator, Flour, water, and starter ratios.
• Cocktail Dilution & Batch Calculator, Scale drinks and ice melt.
• BBQ Meat Quantity Calculator, Pounds by guests and sides.
• Party Food & Drink Estimator, Quantities per guest.
• Cat Age & Pet Age Calculator – Cat Years to Human Years, Convert cat and general pet years to human-equivalent age.
• Pet Food Portion Calculator, Calories by weight and activity.
• Pregnancy Due Date Calculator, LMP or conception date.
• Ovulation Window Estimator, Cycle-based estimate.
• Baby Feeding Amount Calculator, Formula/breast milk by weight and age.
• Child Height Predictor, Estimate from parent heights.
• Scientific Notation Converter Calculator, Decimal to scientific notation.
• Significant Figures Counter & Rounder, Count and round sig figs.
• Mean, Median, Mode & Range Calculator, Basic stats instantly.
• Standard Deviation & Variance Calculator, Population or sample.
• Z-Score & Percentile Calculator, Standard score to percentile.
• Combination & Permutation Calculator, nCr and nPr.
• Prime Factorization Calculator, Factor any integer.
• Fibonacci Sequence Generator, Generate sequence by length.
• Dice Probability Calculator, Odds for dice outcomes.
• Poker Hands Ranked in Order: Official Poker Hand Chart & Odds Calculator, Official poker hands ranking chart from best to worst, plus live Texas Hold'em odds calculator.
• Lottery Odds Calculator, Odds by number picks.
• Julian Date Converter, Calendar date to Julian day.
• Week Number Calculator, ISO week number for any date.
• Moon Phase Calculator, Phase for a given date.
• Sunrise/Sunset Calculator, By date and location.
• Quilt Binding Calculator, Calculate quilt binding strip count, total inches, and exact fabric yardage.
• Quilt Backing Calculator, Calculate quilt backing yardage, panel layout, and seam orientation.
• Curtain Fabric Calculator, Calculate curtain yardage, panel widths, hems, and pattern repeats.
• No Tax on Overtime Calculator, Calculate your federal tax savings and take-home pay under the new US overtime tax exemption law.
• No Tax on Tips Calculator, Estimate your tip income tax savings and take-home pay under the No Tax on Tips policy.
• TV Size & Viewing Distance Calculator, Find the optimal TV screen size for your room distance using THX and SMPTE standards.
• Dog Age Calculator (UCSD DNA Epigenetic Science), Calculate your dog's real scientific human age using DNA methylation research.
• Bra Size Calculator & Sister Size Chart, Find your true bra size with modern direct measurements and sister sizes.
• Australian Bra Size Calculator (AU/NZ Cup & Dress Size Finder), Find your Australian and New Zealand bra size (Dress sizes 6–26) with sister sizes and Berlei/Bonds conversion.
• Asian Bra Size Calculator (Japan, China & Korea JIS Cup Finder), Calculate JIS metric bra sizes (65–100 cm) with 2.5cm cup intervals and Japanese push-up fit adjustments.
• African Bra Size Calculator (South Africa SANS & Pan-African Finder), Calculate South African (SANS 1111) and Pan-African bra sizes with Woolworths and international conversions.
• UK Bra Size Calculator (British Double-Cup & Sister Size Finder), Accurate British bra sizing with double-letter cups (DD, FF, GG, HH) for Panache, Freya & M&S.
• European Bra Size Calculator (EU, French & Italian Cup Finder), Calculate EN 13402 European metric bra sizes (60–120cm), French (FR 80–135), and Italian (Taglia 1–8).
• High School GPA Calculator (Weighted & Unweighted), Calculate unweighted 4.0 and weighted AP, IB, and Honors GPAs with cumulative credits.
• Dog Chocolate Toxicity Calculator & Hotline Guide, Calculate theobromine toxicity dose (mg/kg) for your dog with 24/7 vet hotline emergency advice.
• Pizza Quantity Calculator (How Many Pizzas to Order), Calculate how many pizzas to order for any party, meeting, or group event.
• Overtime Pay Calculator (FLSA & California Rules), Calculate time-and-a-half (1.5x), double time (2.0x), and California daily overtime.
• UK Income Tax Calculator (Take-Home Pay & Salary Calculator), Calculate UK income tax, National Insurance, and take-home pay for 2024/25 & 2025/26.
• Australia GST Calculator (Add or Remove 10% GST & BAS), Add 10% GST or calculate the 1/11th GST component backwards from inclusive totals.
• Roof Pitch Calculator, Convert roof pitch between rise-over-run, degrees, and rafter lengths.
• DC Paycheck Calculator, Estimate Washington DC take-home pay after federal and DC tax.
• Deck Material Calculator, Estimate decking boards, joists, and screws for any deck size.
• Pottery Shrinkage Calculator, Predict fired clay size from wet size and shrinkage rate.
• Scope 3 Commute vs Remote Work Carbon Calculator, Compare office commute vs remote-work emissions per employee.
• Event & Conference Carbon Footprint Calculator, Estimate total CO2e for conferences and events.
• Digital Ad Campaign Carbon Calculator, Turn ad impressions into kg CO2e by format.
• E-Commerce Return & Last-Mile Carbon Calculator, Cost the carbon of delivery and returns per parcel.
• Air vs Ocean Freight Carbon Comparator, Compare air and sea cargo kg CO2e per shipment.
• Video Streaming & Cloud Meeting Carbon Calculator, Does camera-off really save carbon? Measure it.
• Hotel Stay & Business Travel Carbon Calculator, Room-night CO2e by hotel class and region grid.
• Concrete & Cement Embodied Carbon Estimator, Mix-level CO2e per m3 with fly-ash and slag swaps.
• Paper vs Digital Carbon & Savings Calculator, Trees, water and CO2 saved by going paperless.
• AI Prompt & LLM Inference Carbon Calculator, Per-token inference energy and CO2e by model tier.