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32 calculators with instant visual results — from tips and unit conversions to pricing, fitness and finance.
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Tip & Bill Split
Tip percentage and per-person share when splitting a meal.
Percentage Calculator
Find X% of a value, or what percentage A is of B.
Unit Converter
Length, weight, temperature and volume — metric and imperial.
Age & Date Difference
Exact age in years, months and days between two dates.
Discount & Sale Price
Final price after any discount percent, and dollars saved.
Fuel Cost & Mileage
Trip fuel cost, economy in L/100km or MPG.
3D Print Cost Estimator
Filament, power, wear and labor — with a production-cost breakdown and margin rating.
Baker's Pizza Dough Math
Scale hydration, yeast, salt and oil for consistent dough.
NY-Style Pizza Dough
Classic 60% hydration recipe with high-gluten flour and cold-ferment guidance.
Laser Cutting & CNC Cost
Cut time, machine rate and setup — with an itemized job quote.
Sourdough Levain & Fermentation
1:2:2 levain builds, inoculation percent and hydration split.
Resin Casting & Mold Volume
Epoxy volume in mL and ounces with a 2:1 Part A:B mix.
Video Export Bitrate & File Size
File size with a delivery-tier rating — see if it fits upload or platform targets.
Depth of Field & Optics
Hyperfocal distance, focus limits and in-focus range.
Camera Field of View & Crop Factor
FOV in degrees for any lens and sensor, plus 35mm-equivalent focal length.
ND Filter & Camera Exposure
Shutter speed compensation and ND density naming across stops.
Timelapse Interval & Duration
Shooting interval, shot count, playback speed and card storage.
Inverse Square Light Drop-Off
Lux falloff and f-stop loss as distance changes.
TDEE & Recomp Macro Splitter
BMR, maintenance, cut and bulk targets with a protein/carb/fat breakdown.
1RM Strength Matrix
Epley and Brzycki estimates with a bodyweight strength rating.
FFMI & Muscular Potential
Normalized FFMI on the natural-ceiling scale with classification.
Body Fat Percentage
US Navy method estimate from simple body measurements.
Calories Burned
Estimated calories burned by activity, weight and duration.
Wilks & DOTS Powerlifting Score
Relative strength across weight classes with a rating from Novice to Elite.
Karvonen Heart Rate Zones
Five training zones with exact BPM ranges from your heart-rate reserve.
Running Pace & Split Calculator
Pace per km and mile, plus predicted 5K to marathon finish times.
Stock Average Down & Break-Even
Combined cost basis, total invested and how far your DCA has lowered break-even.
Dividend DRIP Compounding
Ten-year portfolio forecast separating contributions from reinvested growth.
Position Size & Risk/Reward
Max shares based on account risk percent, stop loss and target.
Compound Interest & Savings
Ten-year wealth projection showing deposits versus interest earned.
Crypto & Stock Profit ROI
Net profit after exchange fees, ROI percent and units held.
Loan & Mortgage Payment
Monthly principal and interest with a balance amortization chart.
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