From the dinner bill to time dilation at 99% the speed of light — Golden Ticket Calculators is the only calculator you will ever need.
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Basic
Daily Math, Done in a Tap
Percentages, tips, dates, statistics, number bases, powers, and roots — the everyday calculations you look up a dozen times a week, all in one place, always one tap away.
Finance
Money Decisions With Your Eyes Open
See what a “low monthly payment” really costs you over time. Project a retirement nest egg. Watch a credit card balance die under different payoff strategies. Real numbers, no guesswork.
Health
Numbers That Help Your Body
BMI, BMR, TDEE, body fat, sleep cycles, hydration, and pregnancy due dates — the metrics clinicians use, calculated instantly, completely private.
Space
Math at the Edge of the Universe
Pick a destination — Mars, Proxima Centauri, Andromeda. Pick a speed — walking, lightspeed, or 99.99% c. Watch relativistic time dilation unfold in real seconds, years, and centuries. Built for awe.
Convert
Every Unit on Earth (and Off It)
200+ conversions across 12 categories — length, weight, temperature, volume, area, speed, energy, pressure, data, time, cooking, and angle. Cup to ml, BTU to kWh, light-year to AU. Done.
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Your Own Formula Library
Save the formulas you use most. Build new ones. Export them as a single OneCharacterCode string and beam them to another device. Your math, portable forever.
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Percentage Calculator
What is X% of Y?
X is what % of Y?
Percent Change
Tip Calculator
Tip & Split
Date Calculator
Days Between Dates
Add / Subtract Days
Number Base Converter
Decimal / Binary / Hex / Octal
Statistics Calculator
Mean, Median, Mode, Std Dev
Power & Root
Powers, Roots, Logarithms
Loan / Mortgage Calculator
Monthly Payment
Compound Interest
Future Value Calculator
Retirement Planner
Projected Nest Egg
Savings Goal
How Long to Reach Your Goal?
Credit Card Payoff
Debt Freedom Calculator
ROI Calculator
Return on Investment
BMI Calculator
Body Mass Index
BMR & Calorie Needs (TDEE)
Daily Calorie Requirements
Body Fat % (Navy Method)
Body Composition Estimate
Sleep Cycle Calculator
Best Wake or Bedtimes
Based on 90-minute sleep cycles. Add about 15 minutes to fall asleep.
Pregnancy Due Date
Due Date & Current Week
Water Intake
Daily Water Recommendation
SPACE TRAVEL CALCULATOR
Relativistic travel time to any destination in the known universe
Time dilation - Lorentz factor - Earth time vs ship time
Travel Analysis -
Distance
Speed
Earth Time
Ship Time (you age)
Lorentz Factor (γ)
Time You Save vs Earth
Relativistic Effect
What You Would Experience
Destination Intelligence
Moon - 384,400 km
0.00257 AU - 1.28 light seconds
Apollo 11 reached lunar orbit after about three days. The Moon is moving away from Earth by about 3.8 cm per year, measured with lunar laser ranging.FLSPACETOURISM.COM →
Mars - 54.6M to 401M km
0.36 - 2.67 AU - 3 to 22 light minutes
The Earth-Mars distance varies dramatically. Perseverance's cruise to Mars took about seven months. Crewed mission plans remain in development, and announced dates can change.FLSPACETOURISM.COM →
Proxima Centauri - 4.244 light years
268,770 AU - 40.14 trillion km
The nearest star to our Sun. Hosts Proxima Centauri b - a potentially habitable exoplanet in the star's habitable zone. Breakthrough Starshot plans laser-propelled nanosails at 20% c for a 20-year flyby. At New Horizons' speed: 73,000 years.
TRAPPIST-1e - 39.46 light years
2.5 million AU - 373 trillion km
One of 7 Earth-sized planets orbiting an ultra-cool red dwarf. TRAPPIST-1e receives 66% of Earth's solar radiation - potentially temperate. The James Webb Space Telescope is analyzing its atmosphere. Among the most exciting life-candidate worlds discovered.
Andromeda Galaxy - 2.537 million light years
2.4 × 10^19 km - 160 billion AU
Our nearest large galactic neighbor. It contains roughly one trillion stars. The Milky Way and Andromeda are expected to interact billions of years from now. At light speed, the trip would take about 2.537 million years from Earth's frame.