Land drainage calculator
Use this calculator to work out the required pipe size per acre and also calculate any gradient fall. Courtesy of the University of Minnesota http://www.extension.umn.edu/agriculture/water/online-calculator/
Roof guttering flow calculator
Select the right gutter size for the amount of flow pouring off a pitched roof. FloPlast’s site gives calculation results for a single roof, hipped roof, valley and double valley roofs. http://www.floplast.co.uk/products-related/calculator?m=2
Gravity-fed pipe flow calculator
If you’re an engineer, then the Hazen-Williams formula will be familiar to you when calculating water velocity and discharge rate. If you’re not, you can work out the maths here. http://www.calctool.org/CALC/eng/civil/hazen-williams_g
Flow in pressurised pipe calculator
Another offering using the Hazen-Williams formula, this time for pressure loss over the entire length of a pipe. http://www.calctool.org/CALC/eng/civil/hazen-williams_p
Best online conversion tool
Convert almost anything on this too, from newtons to kg’s, degrees to minutes, parsecs to light years… it’s all here.
http://www.onlineconversion.com/
Scale conversion tool
Yes, this is a website on scale models, but their tool is simple and easy to use (and the rest of the site is interesting too!)
http://www.scalemodelersworld.com/online-scale-converter-tool.html
Map scale calculator
This useful web tool calculates distances on a map. All you need is a ruler and program in the map’s scale. https://rechneronline.de/scale/
Square footage calculator
If you need to work out the square feet of an area, this is the tool for you. It will also calculate in yards and metres, and work out the cost per square foot/yard/metre too. Another reason to use this tool is that it will work out circular areas, triangles, even a trapezoid area.
http://www.calculatorsoup.com/calculators/construction/square-footage-calculator.php
Concrete volume calculator
Another handy tool from Calculator Soup is this concrete volume calculator. It’s just as versatile as the square foot calculator with lots of shape options and will calculate the total cost too.
http://www.calculatorsoup.com/calculators/construction/concrete-calculator.php
Feet and inches length measurement calculator
You can mix ‘old school’ with metric with this handy calculator! Add 6 and 3/8ths of an inch to 8cm!
http://www.inchcalculator.com/
Measure pitch angle calculator
Handy pitch calculator with great visual spirit levels. You can also use this calculator on a phone or tablet, place it on the angle to directly measure pitch and angle. How handy is that!
http://www.blocklayer.com/roof-pitch.aspx
Bricks and mortar calculator
A quick and simple bricks calculator showing the number of bricks and how much mortar needed for a given wall area.
http://everydaycalculation.com/brick.php
Tiling and paving calculator
Work out how many square or rectangular tiles or slabs you need to cover an area.
http://www.online-calculators.co.uk/diy/tiling-paving.php
Pipe diameter calculator
Suitable for both liquid and gases, this tool will calculate the pipe size for the proposed flow rate. You can also use it for calculating velocity.
http://www.pipeflowcalculations.net/pipediameter.xhtml
Percentage calculator
This is our personal favourite! If you haven’t already got this one bookmarked, do it now.
http://www.percentagecalculator.co/
These are web based calculators provided free and in good faith by sites outside of Drainfast’s control. They’re not a substitute for rigorous ‘best practice’. Use these calculators wisely and always double-check the answers.
Written by
Vicki James
Sales & Marketing Coordinator
Vicki is a vital part of the marketing team; from reporting to copywriting, she ensures we complete projects on time.