NumberVibe (201 Converters • 3,500+ Units)
From length and weight to electricity and radiology, convert between any units instantly with precision and ease.
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Converter Categories
Time & Date Converters 🕐 (12)
Convert between timezones, date formats, timestamps, and calculate ages.
Timezone Converter
Convert times between any world timezones with DST
Unix Timestamp Converter
Convert Unix epoch to human-readable dates
Epoch Converter
Unix/Windows/Mac epoch timestamps with all formats
Date Format Converter
Convert between US, EU, ISO and custom date formats
Age Calculator
Calculate exact age with zodiac signs and fun facts
Duration Converter
Convert HH:MM:SS to decimal hours for payroll
Leap Year Calculator
Check leap years and calculate days between dates
Week Number Converter
ISO, US, fiscal weeks and date range lookup
Calendar System Converter
Gregorian, Hebrew, Hijri, Chinese, Persian
Workday Calculator
Count business days, exclude weekends/holidays
Countdown Timer
Live countdown to any date or event
Julian Day Converter
JDN, MJD, astronomical dates
Cooking Converters 🍳 (8)
Recipe scaling, oven temperatures, and cooking measurement conversions.
Recipe Scaler
Scale recipes up or down for any number of servings
Oven Temperature Converter
Convert between Gas Mark, Celsius, and Fahrenheit
Ingredient Weight Converter
Convert cups to grams for 70+ ingredients
Altitude Cooking Converter
Adjust recipes for high elevation baking
Butter Substitution Converter
Find vegan/healthy butter alternatives with ratios
International Measures Converter
US, UK, AU, metric cups and spoons
Egg Size Converter
Convert between egg sizes, includes duck and quail
Sugar Substitute Converter
Stevia, monk fruit, erythritol with calorie info
Digital & Design Converters 🎨 (9)
Color conversion, typography, and digital design tools.
Color Converter
Convert between HEX, RGB, HSL, CMYK color formats
Font Size Converter
Convert px, pt, em, rem, %, vw, vh for web design
Resolution/DPI Converter
Pixels to inches, print size calculator
Image Dimension Converter
Social media sizes and print dimensions
Aspect Ratio Converter
16:9, 4:3, video and photo ratios
Bandwidth Converter
Mbps to MB/s, download time calculator
Video Bitrate Calculator
Encoding settings, file size, quality estimates
Base64 Encoder/Decoder
Encode text to Base64, decode Base64 to text
URL Encoder/Decoder
Percent encoding for URLs, query parameters
Sports & Fitness Converters 🏃 (6)
Running pace, heart rate zones, calories, and athletic performance tools.
Running Pace Converter
Convert min/km, min/mile, race times, training zones
Calorie Burn Calculator
50+ activities with MET values, weight loss tracking
Heart Rate Zone Calculator
Training zones using Karvonen formula
Swimming Pace Converter
/100m, /100yd, SWOLF, training zones
Cycling Power Converter
Watts, W/kg, FTP zones, performance levels
VO2 Max Estimator
Cooper test, beep test, race time to VO2 max
Geographic & Navigation Converters 📍 (5)
GPS coordinates, distance calculations, and navigation tools.
GPS Coordinate Converter
Convert DD, DMS, UTM, DDM with map links
Distance Calculator
Great circle & rhumb line distance between points
Elevation Converter
Meters, feet, flight levels, atmospheric conditions
Map Scale Converter
1:25000, 1:50000, map to real distance
Bearing/Heading Converter
True vs magnetic north, mils, cardinal directions
Chemistry & Lab Converters 🧪 (10)
Scientific converters for laboratory and research applications.
Concentration Converter
Molarity, ppm, ppb, g/L, percent solutions
pH Converter
pH, pOH, H+ and OH- concentrations
Dilution Calculator
C1V1=C2V2, serial dilutions, lab solutions
Molarity Calculator
Mass, MW, volume to molarity, common compounds
Molecular Weight Calculator
Calculate MW from chemical formulas
Gas Law Calculator
PV=nRT ideal gas law calculations
Stoichiometry Calculator
Reactants, products, yield calculations
Specific Gravity Converter
SG, Plato, Brix, Baumé conversions
Temperature-Pressure Converter
Boiling points at various pressures
Mole Fraction Converter
Mole, mass, volume fractions
Audio & Sound Converters 🔊 (8)
Sound level, frequency, and audio engineering tools.
Decibel Converter
dB to ratio, hearing safety, sound levels
Frequency Converter
Hz, kHz, wavelength, musical notes, BPM
Tempo/BPM Calculator
Tap tempo, delay times, metronome, genre matching
Sample Rate Converter
44.1kHz, 48kHz, 96kHz, bit depth, file sizes
Equalizer Calculator
EQ bands, Q factor, frequency ranges
Bit Depth Converter
16/24/32-bit, dynamic range, SNR
Audio File Size Calculator
WAV, FLAC, MP3 file sizes
Sound Intensity Converter
dB SPL, W/m², phons, sones
Photography and Optics 📷 (8)
Tools for photographers - aperture, exposure, and optics calculations.
Aperture F-Stop Converter
F-stops, exposure, depth of field, EV
Shutter Speed Converter
ND filters, reciprocal rule, motion blur
Focal Length Converter
Crop factor, full frame equivalents
Depth of Field Calculator
DoF, hyperfocal distance, focus limits
Exposure Value Calculator
EV, equivalent exposures, light value
Print Size Calculator
DPI, max print size, quality assessment
ND Filter Factor Converter
ND stops to exposure multiplier
Flash Guide Number Calculator
GN to distance/aperture, power levels
Astronomy and Space 🌟 (6)
Convert astronomical distances, celestial coordinates, and space measurements.
Light Year Converter
Light years, parsecs, AU, travel times
Magnitude Converter
Apparent, absolute magnitude, brightness
Planetary Weight Calculator
Weight on Moon, Mars, Jupiter
Orbital Period Calculator
Kepler's 3rd law, orbital velocity
Redshift/Velocity Converter
z-value to velocity, distance, lookback time
RA/Dec Coordinate Converter
Celestial to Alt-Az coordinates
Finance and Trading 💹 (9)
Currency exchange, trading calculations, and financial conversions.
Currency Exchange Calculator
25+ currencies, exchange fees, rates
Pip Value Calculator
Forex trading, lot sizes, risk management
Interest Rate Converter
APR to APY, EAR calculator
Stock Split Calculator
Forward/reverse splits, share calculations
Margin Calculator
Leverage, position size, risk management
Basis Points Converter
BPS to percentage, financial impact calculator
Dividend Yield Calculator
Yield, income projections, after-tax returns
Bond Yield Calculator
YTM, current yield, duration analysis
Lot Size Converter
Standard, mini, micro, nano forex lots
Medical and Pharmaceutical 💉 (10)
Drug dosing, medical unit conversions, and pharmaceutical calculations.
Drug Dosage Calculator
mg/kg dosing, pediatric, volume calculation
Weight-Based Dose Calculator
mg/kg to actual dose, pediatric
Blood Glucose Converter
mg/dL to mmol/L, diabetes ranges
BMI Calculator
Body mass index with ideal weight range
IV Drip Rate Calculator
mL/hr, gtt/min, drug infusion rates
BSA Calculator
Body surface area for drug dosing
Lab Units Converter
SI to conventional units for 30+ tests
Creatinine Clearance Calculator
CrCl, eGFR, CKD staging, drug dosing
Pediatric Dose Calculator
Weight-based dosing, safety checks
Medication Concentration Converter
mg/mL, %, ratio conversions
Construction and Building 🏗️ (8)
Roofing, lumber, concrete, and building material calculations.
Roof Pitch Calculator
Rise/run, angle, rafter length, area
Board Feet Calculator
Lumber quantities, nominal vs actual
Concrete Calculator
Cubic yards, bags needed, mix calculator
Paint Calculator
Gallons needed, coverage estimator
R-Value Converter
Insulation R-value, RSI, U-value
Lumber Dimensions Converter
Nominal vs actual, 2x4 actual size
Wire Gauge Converter
AWG, mm², ampacity, voltage drop
Brick Calculator
Bricks per sqft, mortar, cost estimate
Textile and Fashion 👗 (6)
Clothing sizes, shoe sizes, and fabric measurements.
Shoe Size Converter
US, UK, EU sizes for men, women, kids
Clothing Size Converter
US, UK, EU clothing sizes
Ring Size Converter
US, UK, EU ring sizes, diameter
Fabric Weight Converter
GSM, oz/yd², momme for fabric
Thread Weight Converter
Tex, denier, Ne weight systems
Bra Size Converter
US, UK, EU, AU bra sizes
Aviation ✈️ (6)
Airspeed, altitude, fuel, and aviation-specific calculations.
True Airspeed Calculator
TAS, IAS, Mach, density altitude
Density Altitude Calculator
Aircraft performance altitude
Wind Correction Calculator
WCA, heading, ground speed
Fuel Burn Calculator
Range, endurance, fuel planning
Altitude Converter
Feet, meters, FL, pressure altitude
Weight & Balance Calculator
CG position, loading limits
Brewing and Beverage 🍺 (6)
ABV, specific gravity, IBU, and brewing calculations.
ABV/ABW Converter
Alcohol content, proof, gravity to ABV
Brewing Water Calculator
Water chemistry, mineral additions
Gravity Converter
SG, Plato, Brix for brewing
IBU Calculator
Bitterness from hops, Tinseth/Rager
SRM/EBC Color Converter
Beer color scales with visual preview
Carbonation Calculator
CO₂ volumes, PSI, priming sugar
Agriculture and Gardening 🌱 (5)
Fertilizer, soil, and gardening calculations.
Fertilizer Calculator
NPK rates, lawn and garden applications
Seed Rate Calculator
Seeding rates, PLS, cost estimation
Spray Rate Converter
gal/acre, L/ha, nozzle flow rates
Growing Degree Days Calculator
GDD tracking for crop maturity
Soil Amendment Calculator
Lime, sulfur, pH adjustment
Maritime and Nautical ⚓ (5)
Nautical distances, speed, and marine calculations.
Nautical Mile Converter
NM, cables, fathoms, travel time
Knots Speed Converter
Knots, mph, km/h, Beaufort scale
Anchor Rode Calculator
Scope, chain length, holding power
Displacement Converter
Long tons, metric tons, volume
Tidal Height Calculator
Rule of Twelfths, under keel clearance
Typography and Printing 🔤 (4)
Points, picas, paper sizes, and typographic measurements.
Automotive ⛽ (1)
Fuel economy, vehicle measurements, and automotive calculations.
Electrical & Wiring ⚡ (1)
Wire gauge, voltage drop, and electrical calculations.
Number Systems 🔢 (2)
Convert between number systems and numeral formats.
Text Converters 📝 (3)
Text case conversion, word counting, and placeholder text.
Shopping & Finance 🛒 (3)
Compare prices, calculate tips, and find discounts.
Data Format Converters 📋 (1)
Convert between data formats like JSON and YAML.
Math Converters ➕ (3)
Percentage, fraction, ratio, and math calculations.
Health & Body Converters 🏥 (1)
Body composition, fitness, and health-related calculations.
Generators & Random 🎲 (5)
Generate passwords, UUIDs, random numbers, colors, and hashes.
Password Generator
Secure passwords with custom options
UUID Generator
Generate v4 and v1 UUIDs in bulk
Hash Generator
SHA-256, SHA-512 cryptographic hashes
Random Number Generator
Random numbers, dice, lottery picks
Color Palette Generator
Random, analogous, complementary palettes
Network & IP 🌐 (1)
IP address calculations, subnets, and networking tools.
Common Converters 🔄 (18)
Essential everyday unit conversions for length, weight, temperature, and more.
Length Converter
Convert between meters, feet, inches, miles, kilometers
Weight & Mass Converter
Convert between kilograms, pounds, ounces, grams
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin
Volume Converter
Convert between liters, gallons, cups, milliliters
Area Converter
Convert between square meters, acres, hectares
Time Converter
Convert between hours, minutes, seconds, days
Speed Converter
Convert between mph, km/h, knots, m/s
Pressure Converter
Convert between PSI, bar, Pascal, atmospheres
Energy Converter
Convert between joules, calories, kWh, BTU
Power Converter
Convert between watts, horsepower, kilowatts
Force Converter
Convert between newtons, pounds-force, dynes
Angle Converter
Convert between degrees, radians, gradians
Data Storage Converter
Convert between bytes, KB, MB, GB, TB
Fuel Consumption Converter
Convert between mpg, L/100km, km/L
Volume (Dry) Converter
Convert between bushels, pecks, dry quarts
Currency Converter
Convert between USD, EUR, GBP, and more currencies
Case Converter
Convert text between uppercase, lowercase, title case
Numbers Converter
Convert between decimal, binary, hexadecimal, octal
Engineering Converters ⚙️ (8)
Specialized converters for engineering and scientific applications.
Torque Converter
Convert between newton-meters, foot-pounds, inch-pounds
Acceleration Converter
Convert between m/s², ft/s², g-force
Density Converter
Convert between kg/m³, g/cm³, lb/ft³
Flow Rate Converter
Convert between L/s, gal/min, m³/h
Moment of Inertia Converter
Convert between kg·m², lb·ft², slug·ft²
Viscosity Converter
Convert between Pa·s, poise, centipoise
Angular Velocity Converter
Convert between rad/s, rpm, deg/s
Angular Acceleration Converter
Convert between rad/s², rpm/s, deg/s²
Heat Converters 🔥 (4)
Thermal and heat-related unit conversions.
Heat Capacity Converter
Convert between J/(kg·K), BTU/(lb·°F)
Heat Flux Density Converter
Convert between W/m², BTU/(h·ft²)
Thermal Conductivity Converter
Convert between W/(m·K), BTU/(h·ft·°F)
Thermal Expansion Converter
Convert between 1/K, 1/°C, 1/°F
Fluids Converters 💧 (3)
Fluid dynamics and viscosity conversions.
Light Converters 💡 (3)
Photometric and light measurement conversions.
Electricity Converters ⚡ (7)
Electrical unit conversions for current, voltage, resistance, and more.
Electric Current Converter
Convert between amperes, milliamps, microamps
Electric Charge Converter
Convert between coulombs, amp-hours, faradays
Electric Potential Converter
Convert between volts, millivolts, kilovolts
Electrical Resistance Converter
Convert between ohms, kilohms, megohms
Electrical Conductance Converter
Convert between siemens, mhos, micromhos
Capacitance Converter
Convert between farads, microfarads, picofarads
Inductance Converter
Convert between henrys, millihenrys, microhenrys
Magnetism Converters 🧲 (3)
Magnetic field and flux unit conversions.
Radiology Converters ☢️ (3)
Radiation measurement and dosage conversions.