3D shed roof calculator (single slope, pent roof): truss design + rafters templates. Roofing materials layout plans.

3D shed roof calculator (single slope, pent roof): truss design + rafters templates. Roofing materials layout plans.

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the Calculator will be available after changes in the relevant parameters.
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Choose Drawing:
Distance: 0
Calculation resultsRoof
  • Roof angle (pitch): 15.12 °
  • Length from ridge to eave: 538.66 mm
  • Total roof width with overhangs: 680 mm
  • Roof area (square): 36.629 m2
  • Rafter cut angle: 74.88 °
  • Rafter plumb cut depth: 4.05 mm
  • Total rafter lumber length: 542.71 mm
  • Total rafter length with overhang: 538.66 mm
  • Rafter depth: 15 mm
  • Rafter thickness: 5 mm
  • Length from ridge plumb cut to upper heel cut (plumb): 103.59 mm
  • Distance from the rafter tail cut to bottom heel cut: 51.79 mm
  • Length from upper birdsmouth plumb cut to bottom plumb cut: 383.28 mm
  • Seat cut (bottom): 5 mm
  • Plumb cut or heel cut (bottom): 1.35 mm
  • Seat cut (upper): 5 mm
  • Plumb or heel cut (upper): 1.35 mm
Wall plate (inferior purlin)
  • Width: 15 mm
  • Height: 15 mm
  • Length: 680 mm
Roofing underlayment
  • Total length: 5000 mm
  • Number of strips: 7 pcs.
Rafter spacing
  • S1: 30 mm
  • S2: 30 mm
  • S3: 60 mm
  • S4: 60 mm
  • S5: 60 mm
  • S6: 60 mm
  • S7: 60 mm
  • S8: 60 mm
  • S9: 60 mm
  • S10: 60 mm
  • S11: 10 mm
  • S12: 30 mm
  • S13: 30 mm
Batten spacing
  • L1: 50 mm
  • L2: 50 mm
  • L3: 50 mm
  • L4: 50 mm
  • L5: 50 mm
  • L6: 50 mm
  • L7: 50 mm
  • L8: 50 mm
  • L9: 38.66 mm
Materials for constructionRoof covering materials (sheets or pieces)
  • Width: 125 mm
  • Length: 250 mm
  • Sheets or pieces: 18 pcs.
  • Area: 56.25 m2
  • Rafter depth: 15 mm
  • Length: 542.71 mm
  • Rafter thickness: 5 mm
  • Number: 14 pcs.
  • Wood volume: 0.57 m3
Counter-batten (lath)
  • Width: 5 mm
  • Length: 538.66 mm
  • Thickness: 3 mm
  • Number: 14 pcs.
  • Wood volume: 0.113 m3
Roofing battens (lath)
  • Width: 10 mm
  • Length: 680 mm
  • Thickness: 2.5 mm
  • Number: 10 pcs.
  • Wood volume: 0.17 m3
Wall plate (inferior purlin)
  • Width: 15 mm
  • Length: 680 mm
  • Height: 15 mm
  • Number: 2 pcs.
  • Wood volume: 0.306 m3
Roofing underlayment
  • Width: 100 mm
  • Length: 1000 mm
  • Rolls: 5 pcs.
  • Area: 50 m2
Roof insulation materials
  • Thickness: 15 mm
  • Volume: 2.817 m3
Initial parametersDisplay
  • Units of length: cm mm
  • Technical drawings color: paint mm
Type of roofing material
  • Hard (e.g. shingles or metal roofing):  selected
  • Rear or eave overhang (bottom): 50 mm
  • Front overhang (upper): 70 mm
  • Rake overhang (side): 40 mm
  • Install fly rafters (barge):  selected
  • Install rafters close to the wall (parallel):  selected
  • House width: 400 mm
  • House length: 600 mm
  • Wall thickness: 30 mm
  • Wall height (high wall): 400 mm
  • Wall height (short wall): 300 mm
Wall plate (inferior purlin)
  • Width: 15 mm
  • Height: 15 mm
  • Birdsmouth seat cut (bottom): 5 mm
  • Birdsmouth seat cut (upper): 5 mm
  • Rafter depth: 15 mm
  • Rafter thickness: 5 mm
  • Rafters spacing: 60 mm
Roofing underlayment
  • Width: 100 mm
  • Length: 1000 mm
  • Headlap: 15 mm
  • Sidelap: 15 mm
Counter-batten (lath)
  • Thickness: 3 mm
Roofing battens (lath)
  • Width: 10 mm
  • Thickness: 2.5 mm
  • Battens spacing: 50 mm
Sheating OSB board
  • Width: 125 mm
  • Length: 250 mm
  • Thickness: 1.4 mm
Roof covering materials (sheets or pieces)
  • Width: 125 mm
  • Length: 250 mm
  • Headlap (overlap from above): 15 mm
  • Sidelap: 10 mm
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    • Subscription "Novice" enables access to detailed drawings and calculations. The preservation of each unique calculation is charged separately. In accordance with price list. Any purchased you can re-calculate the free to download an unlimited number of times. The list of "Saved calculations" available at Personal account.
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    • Subscription Pro allows you to set the drawings of your logo or off are available. Enables access to detailed drawings and calculations, provides the ability to save and download any of the calculations ofunlimited the number of times for the duration of your subscription.
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  5. Usually save the results of calculation do not exceed 1 minute.

In case of problems when saving the results of the calculation, please send us a bug report through the form feedback contact page.


Kalk.pro is online shed roof calculator (single slope, pent roof, skillion) - program determines basic material consumption for roof building, roofing underlayment volume, all quantitative and dimensional values of the shed pent roof truss system:

  1. Dimensions and area of a shed roof, materials quantity for it, the roof angle (pitch);
  2. Number of rafters and their dimensions;
  3. Roof battens (lath) – volume and number.
  4. Other important dimensions of the  truss system

Kalk.pro provide dimensional calculatios only,  it doesn't perform any structural calculations (load-bearing) You are responsible for ensuring  that your roof meets all local building codes and laws (international) and that your structural design is ok (your roof construction is capable of resisting all applied loads).


You need to calculate shed roof online calculator?

Measure and define the main parameters of the house with a pent roof. To start select the type of roof - solid or soft roof (this will depend on the type of sheathing). If the material will be chosen roofing material, then the calculator additionally calculates the OSB sheets needed to create the underlay material. When calculating the number of swaps the calculator takes into account the location of the private dock of the leaves on oberste and obiskov from the already stacked sheets.

Attention! We ask you to choose carefully the units of measurement, as well as to control data input - it must be in the same units of measurement.

Do not break your head over how to calculate roof area and amount of building materials. Just make the original data in the corresponding Windows, select unit, then press "Calculate". In the end, you will receive a detailed calculation of the size shed roof and its elements, the volume of necessary materials.

Also we invite you to calculate the parameters of each individual truss legs on a separate calculator rafters of a shed roof, and to obtain drawings with printed sepilok and other important dimensions and characteristics.

Online drawing, 3D visualization - all for your convenience

Calculator shed roof specially designed to simplify working with data. The calculation results are immediately displayed on the tab of drawings. The drawing shed roof is given in several variants – planar and volumetric representation for a more visual display of the future of the roof structure.

Again, for clarity, the tab "3d view" shows a shed roof in 3D. You can view every detail in detail, to enable and disable elements of the roof, zoom in, rotate – any interaction with a ready-made design according to your source data.

Totals calculate shed roof you can save, print, fold mail, and also share in social networks. 

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Specify dimensions
Type of roofing material
Wall plate (inferior purlin)
Roofing underlayment
Counter-batten (lath)
Roofing battens (lath)
Sheating OSB board
Roof covering materials (sheets or pieces)