Free Online Calculators & Tools
Fast, accurate, no-signup calculators for finance, health, e-commerce, construction and everyday life.
💰 Finance, Tax & Work
Taxes, retirement, interest and paycheck math
CD Calculator
Certificate of deposit maturity value and interest earned with APY compounding.
Open tool →Time Card Calculator
Weekly work hours with breaks deducted, overtime split, and gross pay estimate.
Open tool →Income Tax Calculator
2026 federal brackets, standard deduction and take-home pay after FICA.
Open tool →Tax Refund Calculator
Estimate your 2026 refund or amount owed, with child tax credit included.
Open tool →401(k) Calculator
Project your 401(k) balance at retirement with employer match and raises.
Open tool →Amortization Calculator
Monthly mortgage payment, full payoff schedule and extra-payment savings.
Open tool →Time Clock Calculator
Track multiple shifts, deduct breaks and compute overtime past 40 hours.
Open tool →Salary to Hourly Calculator
Convert salary to hourly, daily, weekly and monthly pay — with after-tax view.
Open tool →🛒 E-commerce & Seller Tools
Know your real profit before you list
Amazon FBA Calculator
True per-unit profit after referral, fulfillment and storage fees — with margin verdict.
Open tool →Etsy Fee Calculator
Exactly how much Etsy takes from each sale — listing, transaction, processing and ads fees.
Open tool →🍔 Health & Nutrition
Calories, macros and measurements
Chipotle Calorie Calculator
Build your order ingredient by ingredient and see calories, protein, carbs and sodium.
Open tool →Peptide Calculator
Reconstitution concentration and syringe-unit draw volume for research purposes.
Open tool →TDEE Calculator
Daily calorie needs from the Mifflin-St Jeor equation, with loss and gain targets.
Open tool →Macro Calculator
Split your calories into protein, carbs and fat with five diet presets.
Open tool →Sleep Calculator
Find your ideal bedtime or wake time based on 90-minute sleep cycles.
Open tool →📅 Date & Time
Day counting made instant
90 Days From Today
What date is 90 days from today? Instantly calculate any future or past date.
Open tool →🏗️ Construction & DIY
Job-site math without the headache
Roof Pitch Calculator
Roof pitch angle, slope percentage and rafter length from rise and run.
Open tool →Concrete Calculator
Cubic yards, bags and cost for slabs, footings and columns — with waste factor.
Open tool →Tire Size Calculator
Decode tire sizes and compare diameter, circumference and speedometer error.
Open tool →🎓 Education
Grades and GPA
🏈 Fantasy & Fun
Win your league
Dynasty Trade Calculator
Evaluate dynasty fantasy football trades with 2026 consensus player values.
Open tool →Why ProjectCalc?
Instant results
Every calculator runs in your browser — no page reloads, no waiting.
No accounts, ever
We don’t ask for your email just to show you a number.
Real 2026 data
Fee schedules, nutrition data and player values updated for this year.
Mobile-first
Works one-handed on your phone — job site, gym or Chipotle line.
100% free. No signup. Just answers.
New calculators added every week — bookmark us and come back often.