Directory
All Tools
All Online Calculators
Browse every online calculator available on My Time Calculators. All tools run instantly in your browser — no sign-up, no downloads.
Financial Calculators
Mortgage Calculator
Estimate mortgage payments, interest, amortization, and payoff time.
Loan Calculator
Calculate loan payments, total interest, and payoff schedule fast.
Auto Loan Calculator
Estimate auto loan payment, interest, fees, and full schedule.
Interest Calculator
Calculate simple or compound interest on deposits and loans.
Payment Calculator
Estimate payment amount by rate, term, and principal balance.
Retirement Calculator
Plan retirement savings, growth, and withdrawals by timeline.
Biology Calculators
Generation Time Calculator
Estimate microbial generation time from growth data in seconds.
Ligation Calculator
Plan DNA ligation by calculating insert:vector ratio and amounts.
Cell Dilution Calculator
Compute dilution factors and final concentrations for lab prep.
Log Reduction Calculator
Calculate log reduction and percent kill from microbial counts.
Cell Doubling Time Calculator
Estimate doubling time from cell growth rate and observations.
Protein Concentration Calculator
Convert absorbance to protein concentration using common assays.
AI Calculators
Token Calculator
Estimate token count and usage for chat, text, and prompts.
Embedding Cost Calculator
Calculate embedding cost by tokens, model pricing, and volume.
AI API Cost Calculator
Estimate AI API cost from input/output tokens and requests.
Prompt Length Calculator
Measure prompt length in tokens, characters, and words.
Text Similarity Calculator
Compare text similarity using embeddings and match scoring.
Cosine Similarity Calculator
Compute cosine similarity between vectors for semantic matching.
Construction Calculators
Concrete Calculator
Calculate concrete volume and material needs for slabs and footings.
Roofing Calculator
Estimate roofing area, materials, waste factor, and coverage.
Tile Calculator
Calculate tile quantity, coverage, cuts, and grout allowance.
Mulch Calculator
Estimate mulch volume, bags, and coverage for landscaping.
Gravel Calculator
Calculate gravel volume, weight, and truckloads needed.
Square Footage Calculator
Measure square footage for rooms, floors, and projects.
Math Calculators
Scientific Calculator
Solve advanced math with functions, trig, logs, and constants.
Fraction Calculator
Add, subtract, multiply, and divide fractions with steps.
Exponent Calculator
Calculate exponents and powers with negative and decimal inputs.
Binary Calculator
Convert and calculate binary values with fast base operations.
Hex Calculator
Convert and calculate hexadecimal values with base-16 tools.
Log Calculator
Calculate logarithms with any base, including ln and log10.
Gemstone Calculators
Carat to Gram Converter
Convert carats to grams instantly with accurate weight formulas.
MM to Carat Conversion Calculator
Convert millimeter measurements to estimated carat weight by shape.
Gemstone Weight Calculator
Estimate gemstone weight from dimensions, shape, and specific gravity.
Diamond Carat Weight Calculator
Estimate diamond carat weight from measurements and cut style.
Cabochon Weight Calculator
Estimate cabochon weight from dimensions and material density.
Gemstone Specific Gravity Calculator
Calculate gemstone specific gravity to support weight and ID checks.
Health Calculators
Calorie Calculator
Estimate daily calories for weight loss, maintenance, or gain.
TDEE Calculator
Calculate TDEE to set calorie targets for your fitness goal.
BMR Calculator
Calculate BMR to estimate resting calories burned per day.
BMI Calculator
Calculate BMI and check weight category by height and weight.
Body Fat Calculator
Estimate body fat percentage using measurements and formulas.
Army Body Fat Calculator
Estimate body fat percent using U.S. Army tape-test method inputs.
Lifestyle Calculators
Recipe Multiplier Calculator
Scale recipes up or down by servings with accurate ratios.
Baking Conversion Calculator
Convert baking measurements between cups, grams, and ounces.
Tip Calculator
Calculate tips by percentage and split tips per person.
Bill Split Calculator
Split a bill evenly or by shares, with tip and tax options.
Oven Temperature Conversion Calculator
Convert oven temperatures between °C, °F, and gas marks.
Coffee Ratio Calculator
Dial in coffee brew ratio using grams, water, and strength.
Numerology Calculators
Life Path Number Calculator
Calculate your Life Path number from birth date instantly.
Destiny Number Calculator
Calculate your Destiny number using full name numerology values.
Expression Number Calculator
Calculate your Expression number from your full name spelling.
Soul Urge Number Calculator
Calculate Soul Urge number from vowels in your name.
Personality Number Calculator
Calculate Personality number from consonants in your name.
Birthday Number Calculator
Calculate Birthday number from the day you were born.
Science Calculators
Wind Chill Calculator
Calculate wind chill temperature from wind speed and air temp.
Heat Index Calculator
Calculate heat index from temperature and humidity instantly.
Dew Point Calculator
Calculate dew point from temperature and relative humidity.
Humidity Calculator
Calculate relative humidity from temperature and dew point.
Air Quality Index Calculator
Calculate AQI category from pollutant levels and thresholds.
Carbon Footprint Calculator
Estimate your carbon footprint from travel, energy, and habits.
Technology Calculators
IP Subnet Calculator
Calculate subnet ranges, CIDR, and usable IPs instantly.
Password Generator
Generate strong passwords with length, symbols, and options.
JSON Formatter
Format, validate, and prettify JSON for easy readability.
Base64 Encoder/Decoder
Encode or decode Base64 strings for data and text.
Hash Generator
Generate hashes (MD5/SHA) from text for quick checks.
UUID Generator
Generate UUIDs (v4) for apps, databases, and testing.
Time Calculators
Age Calculator
Calculate age in years, months, days, and exact date differences.
Date Calculator
Add or subtract dates and calculate day counts between dates.
Time Calculator
Calculate time differences, add time, and convert time units.
Hours Calculator
Calculate total hours between times, shifts, or date ranges.
Day Counter Calculator
Count days between dates with inclusive and exclusive options.
Time Zone Calculator
Convert time zones and compare times across cities instantly.
Travel Calculators
Fuel Cost Calculator
Estimate fuel cost for trips using distance, mpg, and price.
Gas Mileage Calculator
Calculate gas mileage (MPG) from distance and fuel used.
Mileage Calculator
Calculate travel distance and mileage between locations.
Flight Time Calculator
Estimate flight time from distance, speed, and routes.
Taxi Fare Calculator
Estimate taxi fare using distance, time, base fare, and rates.
Luggage Weight Calculator
Estimate luggage weight and compare airline baggage limits.