Construction & Engineering Calculators

Enter the span and the load and read the maximum bending moment, the shear force and the reaction at each support.

Enter the span, the load, E and the section's I to get the maximum deflection — with the usual span/360 serviceability limit checked beside it.

Pick the shape, enter its dimensions and a fill level to get the full capacity and how much liquid is inside — including the shapes where fill is deliberately not linear.

T = K · d · F in either direction — enter a clamp load to get the torque, or a torque to see the tension it develops.

Q = V·A for a circular pipe, in either direction: enter a velocity to get L/s, L/min, m³/h and GPM, or enter a flow to get the velocity.

Enter the span and the load and read the maximum bending moment, the shear force and the reaction at each support.

Enter the span, the load, E and the section's I to get the maximum deflection — with the usual span/360 serviceability limit checked beside it.

A beam fixed at one end only, with a point load at the free end or a uniform load along its length — deflection at the tip and moment at the wall.

T = K · d · F in either direction — enter a clamp load to get the torque, or a torque to see the tension it develops.

Enter the bolt circle diameter, the bolt count and a start angle to get every bolt's coordinates, the angular pitch and the chord between neighbours — plotted as it will be drilled.

Q = V·A for a circular pipe, in either direction: enter a velocity to get L/s, L/min, m³/h and GPM, or enter a flow to get the velocity.

Enter the internal diameter and the length of the run to see how much liquid the pipe holds — plus the water weight, which reads straight off the litres.

Pick the shape, enter its dimensions and a fill level to get the full capacity and how much liquid is inside — including the shapes where fill is deliberately not linear.

Fill a container and time it, or compute it from velocity and bore — reported together in L/s, L/min, m³/h and US gallons per minute.

Two modes that answer two different questions: P = F ÷ A for a piston pushing on oil, and P = ρ·g·h for the weight of a column of fluid.

Enter the fluid's density and viscosity, the velocity and the pipe bore to get the Reynolds number and which flow regime it puts you in.

Two first-course modes: Q = k·A·ΔT ÷ d through a flat wall, and Q = h·A·ΔT from a surface — each with the thermal resistance of the path.

ΔL = α·L₀·ΔT with material presets for steel, aluminium, copper, concrete, glass, PVC and oak, and a negative ΔT for cooling.

Engineering notation forces the exponent to a multiple of three, so it always lines up with an SI prefix — 4.5 × 10^6 is 4.5 M, 420 × 10^-6 is 420 µ.

Enter the span and the load and read the maximum bending moment, the shear force and the reaction at each support.

Enter the span, the load, E and the section's I to get the maximum deflection — with the usual span/360 serviceability limit checked beside it.

A beam fixed at one end only, with a point load at the free end or a uniform load along its length — deflection at the tip and moment at the wall.

T = K · d · F in either direction — enter a clamp load to get the torque, or a torque to see the tension it develops.

Enter the bolt circle diameter, the bolt count and a start angle to get every bolt's coordinates, the angular pitch and the chord between neighbours — plotted as it will be drilled.

Q = V·A for a circular pipe, in either direction: enter a velocity to get L/s, L/min, m³/h and GPM, or enter a flow to get the velocity.

Enter the internal diameter and the length of the run to see how much liquid the pipe holds — plus the water weight, which reads straight off the litres.

Pick the shape, enter its dimensions and a fill level to get the full capacity and how much liquid is inside — including the shapes where fill is deliberately not linear.

Two modes that answer two different questions: P = F ÷ A for a piston pushing on oil, and P = ρ·g·h for the weight of a column of fluid.

Fill a container and time it, or compute it from velocity and bore — reported together in L/s, L/min, m³/h and US gallons per minute.

Enter the fluid's density and viscosity, the velocity and the pipe bore to get the Reynolds number and which flow regime it puts you in.

Two first-course modes: Q = k·A·ΔT ÷ d through a flat wall, and Q = h·A·ΔT from a surface — each with the thermal resistance of the path.

ΔL = α·L₀·ΔT with material presets for steel, aluminium, copper, concrete, glass, PVC and oak, and a negative ΔT for cooling.

Engineering notation forces the exponent to a multiple of three, so it always lines up with an SI prefix — 4.5 × 10^6 is 4.5 M, 420 × 10^-6 is 420 µ.