All Calculators
366 free calculators and converters, organised by category. Everything runs in your browser — nothing is uploaded or stored.
Surveying, Coordinates, GIS & CAD
View category- DMS to Decimal Degrees Converter
- MGA94 to MGA2020 Coordinate Converter
- British National Grid (OSGB36) Converter
- RGF93 / Lambert-93 Converter (France)
- Swiss LV95 / LV03 Converter
- Irish Grid / ITM Converter
- MGA2020 / GDA2020 Converter (Australia)
- Geohash Encoder / Decoder
- Maidenhead Grid Locator Converter
- DDM to DMS Converter
- DDM to Decimal Degrees Converter
- Decimal Degrees to DDM Converter
- DMS to DDM Converter
- Signed vs Cardinal Coordinate Notation Converter
- Latitude/Longitude Validator (Range & Format)
- Lat/Long to UTM Converter (WGS84)
- UTM to Lat/Long Converter
- UTM Zone Finder from Coordinates
- Lat/Long/Height to ECEF Converter
- ECEF X/Y/Z to Lat/Long/Height Converter
- ENU (East/North/Up) to ECEF Converter
- AER (Azimuth/Elevation/Range) to ECEF Converter
- Easting/Northing Distance Calculator
- Drone Battery Count Calculator
- Survey Area Coverage Calculator
- Photogrammetry Accuracy Estimate Calculator
- Prism Constant Check Calculator
- Survey Tolerance Checker
- Grid Convergence Angle Calculator
- Reduced Latitude Calculator
- Geocentric vs Geodetic Latitude Converter
- Vincenty Ellipsoidal Distance Calculator
- Great-Circle vs Rhumb Line Distance Comparison
- UTM Scale Factor Calculator
- Combined Scale Factor Helper
- Coordinate Precision Estimator (Decimal Places to Metres)
- Datum Shift Magnitude Calculator
- Ellipsoidal to Orthometric Height Converter
- Bearing & Distance to Coordinates Calculator
- Coordinates to Bearing & Distance Calculator
- Coordinate Offset Calculator
- Coordinate Difference Calculator
- Grade & Fall Calculator
- Vertical Difference Calculator
- Station Chainage & Offset Calculator
- Traverse Misclose Calculator
- Traverse Closure Ratio Calculator
- Angular Misclose Calculator
- Two-Peg Test Calculator
- RL Difference Calculator
- Drone GSD Calculator
- Flight Altitude from GSD Calculator
- Photo Overlap Calculator
- Drone Flight Line Spacing Calculator
- Image Footprint Calculator
- Azimuth to Bearing Converter
- Horizontal Distance from Slope Distance Calculator
- Haversine Great-Circle Distance Calculator
- Drone Image Count Calculator
- Ground Control Density Calculator
- Latitude and Longitude Converter
Mining, Quarry, Earthworks, Drill & Blast
View category- BCM LCM Tonnes Converter
- Blast Volume Calculator
- Blast Area Calculator
- Blast Pattern Area Calculator
- Blast Perimeter Calculator
- Blast Hole Count Checker
- Bench Height Checker
- Powder Factor Calculator (kg per BCM)
- Specific Charge Calculator
- ANFO Loading Density Calculator
- Decking Ratio Calculator
- Blast Timing Delay Calculator
- Fragmentation P80 Estimator (Kuz-Ram)
- Drill Metres per Shift Calculator
- Drill Utilisation Calculator
- Drill Cost per Metre Calculator
- Designed vs Drilled Metres Calculator
- Drill Consumables Calculator
- Hole Angle Deviation Calculator
- Toe Position Calculator
- Dipping Hole Toe Calculator
- Swell Factor Calculator
- Strip Ratio Calculator
Maths, Education & Science
View category- Percentage Calculator
- Percentage Change Calculator
- Standard Deviation Calculator
- Median Calculator
- Mode Calculator
- Percentile Calculator
- Fraction Calculator
- GPA Calculator
- Final Grade Calculator
- Test Grade Calculator
- Z-Score Calculator
- Normal Distribution Calculator
- Speed, Distance & Time Calculator
- Average (Mean) Calculator
- Ratio Calculator
- Quadratic Equation Calculator
- GCD & LCM Calculator
- Exponent (Power) Calculator
- Square Root Calculator
- Nth Root Calculator
- Logarithm Calculator
- Factorial Calculator
- Permutations Calculator
- Combinations Calculator
- Percentage Difference Calculator
- Modulo Calculator
- Percentage Increase Calculator
- Percentage Decrease Calculator
- Reverse Percentage Calculator
- Prime Number Checker
- Arithmetic Sequence Calculator
- Geometric Sequence Calculator
- Proportion Calculator
- Fibonacci Calculator
Civil Construction, Building Materials & Trades
View category- Concrete Slab Volume Calculator
- Roof Pitch Calculator
- Paint Quantity Calculator
- Flooring Calculator
- Carpet Calculator
- Wallpaper Calculator
- Decking Calculator
- Brick Wall Calculator
- Tile Calculator
- Concrete Bags Calculator
- Fence Calculator
- Gravel Calculator
- Topsoil Calculator
- Mulch Calculator
- Sand Calculator
- Road Base Calculator
- Excavation Calculator
- Paver Calculator
- Retaining Wall Blocks Calculator
- Stair Calculator
- Plasterboard Sheets Calculator
- Pool Volume Calculator
Electrical, Electronics, Solar & Energy
View category- Ohms Law Calculator
- Energy Cost Calculator
- Solar Output Calculator
- Battery Life Calculator
- Watts to Amps Calculator
- Amps to Watts Calculator
- Parallel Resistance Calculator
- Series Resistance Calculator
- LED Resistor Calculator
- Watts to kWh Calculator
- Voltage Divider Calculator
- Capacitor Energy Calculator
- Transformer Turns Calculator
- Inductive Reactance Calculator
- Solar Panel Count Calculator
Geometry, Shape, Area & Volume
View category- Rectangle Area Calculator
- Triangle Area Calculator
- Circle Area Calculator
- Cube Volume Calculator
- Cylinder Volume Calculator
- Sphere Volume Calculator
- Pythagorean Theorem Calculator
- Cone Volume Calculator
- Trapezoid Area Calculator
- Circumference Calculator
- Square Area Calculator
- Parallelogram Area Calculator
- Ellipse Area Calculator
- Rhombus Area Calculator
- Rectangular Prism Volume Calculator
- Pyramid Volume Calculator
- Sphere Surface Area Calculator
- Distance Between Points Calculator
- Slope Calculator
- Triangle Perimeter Calculator
- Rectangle Perimeter Calculator
- Cube Surface Area Calculator
- Cylinder Surface Area Calculator
- Circle from Diameter Calculator
- Annulus Area Calculator
- Regular Hexagon Area Calculator
- Equilateral Triangle Area Calculator
- Sector Area Calculator
- Arc Length Calculator
- Regular Pentagon Area Calculator
- Trapezoid Perimeter Calculator
- Cone Surface Area Calculator
- Regular Polygon Area Calculator
Networking, IT & Sysadmin
View category- IP Range Calculator
- Download Time Calculator
- Mbps to MB/s Calculator
- Subnet Hosts Calculator
- Subnet Mask Calculator
- Bandwidth Calculator
- Data Usage Calculator
- Streaming Data Calculator
- Upload Time Calculator
- Password Entropy Calculator
- Uptime / SLA Calculator
- VoIP Bandwidth Calculator
- Data Cap Calculator
- Network Latency Calculator
Finance, Business, Property & Pricing
View category- GST Add Remove Calculator
- Markup Calculator
- Discount Calculator
- Loan Repayment Calculator
- Mortgage Repayment Calculator
- Credit Card Payoff Calculator
- Mortgage Extra Payment Calculator
- Net Pay Calculator
- Compound Interest Calculator
- Tip Calculator
- Simple Interest Calculator
- Profit Margin Calculator
- Hourly to Salary Calculator
- Fuel Cost Calculator
- Future Value Calculator
- Present Value Calculator
- ROI Calculator
- Salary to Hourly Calculator
- Break-Even Calculator
- Savings Goal Calculator
- LVR Calculator
- APY Calculator
- Rule of 72 Calculator
- Sales Tax Calculator
- Cost Per Unit Calculator
- Unit Price Calculator
- Gross Profit Calculator
- Straight-Line Depreciation Calculator
- Payback Period Calculator
- Emergency Fund Calculator
- Stacked Discount Calculator
- Net Worth Calculator
Publishing, KDP, Creator & Design
View categoryHVAC, Plumbing, Water & Building Services
View categoryUnits, Measurement & Converters
View categoryPDF, Image, File, Data & Developer Tools
View category- Local PDF Merge Tool
- QR Code Generator
- Barcode Generator
- HEX RGB HSL Colour Converter
- Colour Contrast Checker
- Colour Palette Generator
- Aspect Ratio Calculator
- UUID Generator
- Random Number Generator
- Unix Timestamp Converter
- HTML Encoder / Decoder
- JWT Decoder
- Regex Tester
- Text Diff Checker
- Markdown to HTML Converter
- HTML to Markdown Converter
- Cron Expression Parser
- PDF Rotate Tool
- PDF Rearrange Pages Tool
- Delete PDF Pages Tool
- PDF Page Counter & Size Checker
- PDF Metadata Remover
- Image DPI / Print Size Calculator
- Base64 Encoder / Decoder
- URL Encoder / Decoder
- JSON Formatter & Minifier
- CSV to JSON Converter
- Word & Character Counter
- Case Converter
- Hash Generator
- Line Sorter & Deduplicator
- Image Resizer
- Image Converter
- Image Compressor
- PDF Split Tool
- Images to PDF Tool
Time, Date, Roster & FIFO
View categoryHealth, Fitness, Nutrition & Body
View category- BMI Calculator
- BMR Calculator
- TDEE Calculator
- Calorie Deficit Calculator
- Macro Calculator
- Ideal Body Weight Calculator
- Sleep Calculator
- Swim Time Predictor
- Pool Lap Calculator
- Critical Swim Speed Calculator
- Open Water Swim Time Calculator
- Race Finish Time Calculator
- Target Pace Calculator
- Marathon Split Calculator
- Negative Split Planner
- Walking Pace Calculator
- Sprint Speed Calculator
- Required Bike Speed Calculator
- Power-to-Weight Calculator
- FTP Training Zone Calculator
- 2 km Row Time Predictor
- Target Row Split Calculator
- Rowing Watts Calculator
- Brick Workout Calculator
- Swimrun Calculator
- Custom Multisport Calculator
- Swimming Pace Calculator
- Cycling Time Calculator
- Rowing 500m Split Calculator
- Track Lap Split Calculator
- Hiking Time Calculator
- Paddling Time Calculator
- Race Time Predictor
- Triathlon Finish Time Calculator
- Duathlon Calculator
- Aquathlon Calculator
- Aquabike Calculator
- Blood Alcohol Range Calculator
- Body Fat Percentage Range Calculator
- Shoe Size Calculator
- Clothing Size Finder
- Dress Size Calculator
- Jeans Size Calculator
- Shirt Size Calculator
- Bra Size Calculator
- Kids Clothing Size Calculator
- Max Heart Rate Calculator
- Running Pace Calculator
- Daily Water Intake Calculator
- Waist-to-Height Ratio Calculator
- Body Surface Area Calculator
- Protein Intake Calculator
- One-Rep Max Calculator
- Calories to Kilojoules Converter
- Waist-to-Hip Ratio Calculator
- Karvonen Heart Rate Calculator
- Steps to Distance Calculator
- BMI Prime Calculator