Roof Rafter Material Calculator

This calculator is to be used as an estimating tool only.

Roof rafter material calculator.

After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors. Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof. See rafter run to outer wall calculator below. The estimates are based on your house foot print length and width and roof slope.

Input the rafter span on the flat eave overhang and pitch of the roof. To calculate the materials you ll need enter your measurements in the calculator below. Click the button to calculate the stock size needed for this job. Measure from the end of the level up to the bottom edge of the rafter.

It will use the current cost of wooden rafters based on the average price found at home improvement stores. Our calculator will round up to the nearest foot. Includes result for hip valley factor slope factor and the roof slope in degrees. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually.

Allow for ridge thickness when determining rafter run to outer wall. Roof rafter calculator will estimate the length board size quantity cost per board and total cost of lumber. In cases where a roof has a complex shape such as in the image to the right measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.

If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. Gable roof framing calculator plan diagram with full dimensions for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length. Roofing material calculator the calculated area is only an estimation. Roof pitch calculator roof slope calculator the roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need.

Half building width minus 1 2 ridge thickness. This online truss calculator will determine the all in cost of your truss based on key inputs related to the pitch width and overhang of your roof. Prices are based on quotes from multiple lumber yards and building material suppliers.