Construction Calculators

Board and Batten Calculator

Free online Board and Batten Calculator. Quickly calculate and get instant results.

Board on Board Fence Calculator

Free online Board on Board Fence Calculator. Quickly calculate and get instant results.

Boiler Size Calculator

Size a boiler by converting design heat loss into required output and input using pickup factor and

Bolt Circle Calculator

Compute bolt-circle radius, angular spacing, chord length, and coordinates for the next hole on a bo

Bolt Torque Calculator

Estimates bolt tightening torque using T = K × F × D (nut factor method).

Bowl Segment Calculator

Computes chord, arc, angle, and area for a circular (bowl) segment from radius and sagitta.

Box Fill Calculator

Free online Box Fill Calculator. Quickly calculate and get instant results.

CFM Calculator

Computes required ventilation airflow (CFM) from room volume and desired air changes per hour (ACH).

Carbon Equivalent Calculator

Calculates IIW carbon equivalent: CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15.

Carpet Calculator

Calculate carpet area and cost.

Cement Calculator

Free online Cement Calculator. Quickly calculate and get instant results.

Chicken Coop Size Calculator

Estimates indoor area, run area, nesting boxes, and roost length needed for a given flock size.

Clearance Hole Calculator

Estimates a recommended clearance hole diameter from fastener nominal diameter and desired fit (clos

Concrete Block Calculator

Free online Concrete Block Calculator. Quickly calculate and get instant results.

Concrete Block Fill Calculator

Free online Concrete Block Fill Calculator. Quickly calculate and get instant results.

Concrete Column Calculator

Free online Concrete Column Calculator. Quickly calculate and get instant results.

Concrete Cylinder Calculator

Free online Concrete Cylinder Calculator. Quickly calculate and get instant results.

Concrete Driveway Cost Calculator

Free online Concrete Driveway Cost Calculator. Quickly calculate and get instant results.

Concrete Slab Calculator

Free online Concrete Slab Calculator. Quickly calculate and get instant results.

Concrete Stairs Calculator

Free online Concrete Stairs Calculator. Quickly calculate and get instant results.

Concrete Tube Calculator

Free online Concrete Tube Calculator. Quickly calculate and get instant results.

Concrete Weight Calculator

Free online Concrete Weight Calculator. Quickly calculate and get instant results.

Countersink Depth Calculator

Computes countersink depth from included angle and the major/minor diameters using standard cone geo

Crushed Stone Calculator

Estimates crushed stone volume and weight from area, depth, density, and waste percentage.