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Every Calculation You Need, in One Place
Free engineering and science calculators. From mathematics to preliminary technical calculations, work directly in your browser.
Collect every calculation of your project in one place, then print it or save it as a PDF, no spreadsheet needed. My project
Popular searches:
Recently used
Popular calculators
A quick start for everyday calculations. The list is our own pick.
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Materials and Metallurgy
Steel Profile and Pipe Weight Calculator
Weight per metre, per piece and in total for IPE, HEA, HEB, pipe, hollow sections, angles, flat bar and plate. EN and DIN sizes, section drawing, project list, CSV and PDF. -
Civil Engineering
Concrete Volume Calculator
Concrete volume in cubic metres for slabs, footings and columns, with waste allowance, truck count and weight. -
General Calculations and Unit Conversion
Unit Converter: All Units at Once in a Copyable Table
Convert length, pressure, power and more. See all units at once, choose significant digits and copy the whole table. Free to use, no account needed. -
Materials and Metallurgy
Linear Cutting Optimizer for Bars, Pipes and Profiles
Fits your cut list into stock lengths with minimum waste. Saw kerf, end trims, cutting sheet, reusable offcut list and CSV export. -
Fluid Mechanics
Flow Rate, Pipe Diameter and Velocity Calculator
Enter any two of flow rate, inside diameter and velocity to get the third. Q = v × A for a full circular pipe. -
Electrical and Electronics
Electrical Power, Current and Voltage Calculator (Single and Three Phase)
Find power, current, voltage or power factor for single and three phase AC. Active, apparent and reactive power together. -
Civil Engineering
Rebar Weight and Quantity Calculator
Rebar weight per metre, total length, kilograms and tonnes from rows of diameter, length and quantity, with a summary by diameter and CSV export. -
Steel Structures and Statics
Beam Deflection Calculator
Support reactions, maximum moment and maximum deflection for simply supported and cantilever beams under point or distributed load, with shear, moment and deflection diagrams.
Categories
Calculators are grouped by field, then by topic.
- Mathematics 33 calculators
- Physics 38 calculators
- Chemistry 24 calculators
- Geometry 15 calculators
- General Calculations and Unit Conversion 1 calculator
- Mechanical Engineering 34 calculators
- Civil Engineering 34 calculators
- Electrical and Electronics 32 calculators
- Steel Structures and Statics 24 calculators
- Materials and Metallurgy 10 calculators
- Manufacturing, CNC and Welding 19 calculators
- Fluid Mechanics 26 calculators
- HVAC and Thermodynamics 30 calculators
- Surveying and Geodesy 9 calculators
- Statistics and Data Analysis 15 calculators
- Finance, Cost and Project Management 18 calculators
Professional tools
Full-featured tools with their own workspace: multi-row lists, drawings and diagrams.
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Materials and Metallurgy
Linear Cutting Optimizer for Bars, Pipes and Profiles
Fits your cut list into stock lengths with minimum waste. Saw kerf, end trims, cutting sheet, reusable offcut list and CSV export. -
Materials and Metallurgy
Sheet and Plate Cutting Optimizer
Nests rectangular parts on sheets such as 1500×3000. Guillotine or free layout, kerf and edge margin, scaled drawings, offcut list, CSV and SVG export. -
Steel Structures and Statics
Beam Calculator: Shear, Moment and Deflection Diagrams
Analyse simply supported or cantilever beams with point and distributed loads. See reactions, shear, moment and deflection diagrams. Free preliminary tool. -
Civil Engineering
Bar Bending Schedule (BBS) Calculator
Cutting length, total length and weight per bar mark from diameter, shape and dimensions. Straight, L, U and stirrup shapes, bend deduction, CSV and print. -
Civil Engineering
Critical Path Method (CPM) Calculator
Finds project duration, the critical path, early and late times and total and free float from an activity list with durations and predecessors, and draws a bar chart. -
Fluid Mechanics
Pipeline Total Pressure Loss (Elbows, Valves, Fittings)
List straight pipe, elbows, tees, valves and entrance or exit items to get the loss of each, total pressure and head loss and the biggest contributor. K values are editable. -
Steel Structures and Statics
2D Frame Analysis Calculator
Member end forces (N, V, M), support reactions, displacements and rotations of 2D frames and continuous beams. With moment, shear and deflected shape drawings. -
Steel Structures and Statics
Truss Calculator
Member forces (tension, compression), support reactions and joint displacements of a 2D truss. With a drawing, Warren, Pratt and Howe examples and a determinacy check.
Recently added
The latest calculators.
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Materials and Metallurgy
Copper, Brass and Bronze Weight
Calculate plate, bar and tube weight from alloy and section dimensions. Use a typical alloy density or enter the value from your material certificate. -
Materials and Metallurgy
PE, PVC and HDPE Pipe Weight
Calculate plastic pipe weight per metre and total weight from outside diameter, wall thickness or SDR, and length. Select a typical density or enter a certified value. -
Materials and Metallurgy
Metal Coil Weight and Length
Calculate strip length and net metal weight from coil diameters, or length and outer diameter from net weight. -
Materials and Metallurgy
Pipe Internal Volume and Surface Area
Calculate internal capacity, envelope volume, inner and outer lateral surfaces and the footprint of straight pipes.