FREE FOREVER · No login · Offline · CALC1 v1.4|GRATIS PARA SIEMPRE · Sin cuenta · CALC1 v1.4
CALCULATOR_AGENT
English | Español
For You
FREE FOREVER · OFFLINE
ONE APP · SIX UNIVERSES OF MATH
Every Number Question.
One Beautiful App.
From the dinner bill to time dilation at 99% the speed of light — Calculator Agent is the only calculator you will ever need.
34
Calculators
200+
Conversions
100%
Offline
Today's Useful Calculation
Loading...
Inside Calculator Agent
Basic
Daily Math, Done in a Tap
Percentages, tips, dates, statistics, number bases, powers, and roots — the everyday calculations you Google 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.
Build
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.
✓
Yours. Offline. Forever.
No accounts. No tracking. No cloud. Everything you save lives on this device only.
Private Notes
No notes yet. Anything you save stays on this device.
Percentage Calculator
What is X% of Y?
X is what % of Y?
Percent Change
Tip Calculator
Tip & Split
Bill Amount ($) Tip %
Split by (people)
Date Calculator
Days Between Dates
Start Date End Date
Add / Subtract Days
Starting Date Days to Add (negative to subtract)
Number Base Converter
Decimal / Binary / Hex / Octal
Enter Number From Base
Statistics Calculator
Mean, Median, Mode, Std Dev
Numbers (comma separated)
Power & Root
Powers, Roots, Logarithms
Base Number Exponent (leave blank for roots) Root (leave blank for powers)
Loan / Mortgage Calculator
Monthly Payment
Loan Principal ($) Annual Interest Rate (%) Term (months)
Compound Interest
Future Value Calculator
Principal ($) Annual Rate (%) Years Compound Frequency
Monthly Contribution ($)
Retirement Planner
Projected Nest Egg
Current Savings ($) Monthly Contribution ($) Expected Annual Return (%)
Savings Goal
How Long to Reach Your Goal?
Goal Amount ($) Already Saved ($) Monthly Savings ($) Annual Return (%)
Credit Card Payoff
Debt Freedom Calculator
Current Balance ($) APR (%) Monthly Payment ($)
ROI Calculator
Return on Investment
Initial Investment ($) Final Value ($) Time Period (years)
BMI Calculator
Body Mass Index
Unit System
Weight (kg)Height (cm)
Weight (lbs)Height (inches)
BMR & Calorie Needs (TDEE)
Daily Calorie Requirements
Body Fat % (Navy Method)
Body Composition Estimate
Height (cm) Waist circumference at navel (cm) Neck circumference (cm)
Hip circumference (cm) - women only
Sleep Cycle Calculator
Best Wake or Bedtimes
I want to wake up at:
I want to fall asleep at:
Based on 90-min sleep cycles. Add ~15 min to fall asleep.
Pregnancy Due Date
Due Date & Current Week
First Day of Last Menstrual Period (LMP)
Water Intake
Daily Water Recommendation
Weight (kg)
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 took 76 hours traveling at 39,000 km/h. The Moon is drifting from Earth at 3.8 cm/year. Retroreflectors left by Apollo still bounce lasers back to Earth. SpaceX Starship targets a lunar landing this decade. FLSPACETOURISM.COM →
Mars - 54.6M to 401M km
0.36 - 2.67 AU - 3 to 22 light minutes
Distance varies dramatically. The Perseverance rover took 7 months. NASA targets crewed missions in the 2030s. SpaceX Starship aims for cargo by 2026, crewed shortly after. A colony needs 1 million people to be self-sustaining per Elon Musk's estimate. 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 km - 160 quintillion AU
Our nearest galactic neighbor. Contains ~1 trillion stars. In 4.5 billion years the Milky Way and Andromeda will collide and merge into a new elliptical galaxy. Our solar system will survive but may be flung outward. At light speed: 2.537 million years.
Space Tourism Intelligence
FLSPACETOURISM.COM →
Real commercial spaceflight news, timelines & ticket tracking
Length Weight Temp Volume Area Speed Energy Pressure Data Time Cooking Angle
Length Converter
Value From
To
Custom Formula Builder
Build & Save a Formula
Formula Name Expression (use standard math syntax) Description
Saved Formulas
No saved formulas yet. Build one above.
Formula Library
Built-In Reference Formulas
OCC Export / Import
OneCharacterCode Data Transfer
Export all saved formulas as a compressed OCC code. Share or import on another device.
Import OCC Code
Load New Formula Packs
Formula Pack Code
Enter a formula pack code shared by the community or from a GOLD_AGENT update to load new formula collections instantly.
© CALC1 Free Forever Calculators · All Rights Reserved