Last checked
May 22, 2026
We checked the page logic, support notes, and related links on this page.
Project planner
Plan roofline runs and accessories before you order
Roofline work is easiest to price when gutter runs, outlets, downpipes, fascia, soffit, guards, clips, access, and disposal are counted from the same roof edge survey.
5 linked calculatorsScope checklistProject sequence
roofline calculatorgutter and fascia calculatorsoffit and fascia calculator
How to use it
Planning before buying
Use this planner to keep the measurements, material list, and quote scope aligned before anyone prices the work.
Why trust it
See how the site is maintained
Read the calculator methodology and editorial policy for the standards behind these pages.
Measure first
Take these measurements once, then reuse them through the calculators so the order, budget, and quote request stay aligned.
- Gutter run lengths
- Outlet and corner positions
- Fascia board runs
- Soffit runs
- Downpipe drops
Planning order
Work through the job in this order so the visible finish, hidden layers, accessories, and cost checks are not priced as separate guesses.
Step 1
Measure each roof edge run
Split straight gutter runs from corners, stop ends, outlets, returns, and awkward roof edges before calculating stock lengths.
Open Gutter CalculatorStep 2
Add guards where needed
Only calculate guards for the runs that need them, and allow for corners, outlets, and sections that may be left open for maintenance.
Open Gutter Guard CalculatorStep 3
Check fascia and soffit lengths
Measure fascia and soffit boards separately. They share the roofline but do not share the same stock lengths, joins, or fixings.
Open Fascia CalculatorStep 4
Estimate downpipes
Count drops, offsets, shoes, brackets, and outlet positions after the gutter layout is known.
Open Downpipe CalculatorCalculators in this plan
Each calculator covers one decision in the job: quantity, coverage, depth, fixings, accessories, or budget. Keep the outputs together when you build the buying list.
Step 1Roofline
Gutter Calculator
Estimate gutter lengths, stock pieces, joints, waste allowance, and rough material cost for simple roofline runs.
Open calculatorStep 2Roofline
Gutter Guard Calculator
Estimate gutter guard lengths, pieces, and rough cost for roof edge protection.
Open calculatorStep 3Roofline
Fascia Calculator
Estimate fascia board lengths and rough cost from roofline runs.
Open calculatorStep 4Roofline
Soffit Calculator
Estimate soffit board quantities and rough cost for roof edges.
Open calculatorStep 5Roofline
Downpipe Calculator
Estimate downpipe lengths and pieces for drainage runs.
Open calculatorMaterial checklist
Treat this as the first pass at the buying list. Add product names, sizes, grades, and exclusions before sending it for a price.
- Gutters
- Gutter guards
- Fascia boards
- Soffit boards
- Downpipes
- Corners, outlets, clips, and unions
Common mistakes
These are the places where tidy measurement maths often breaks once products, delivery, site access, and labour are involved.
- Counting straight gutter but missing corners
- Forgetting clips and outlets
- Treating fascia and soffit as one board quantity
Brief to send for pricing
Price guttering, guards, fascia, soffits, downpipes, brackets, outlets, clips, access equipment, old material removal, disposal, and exclusions separately.
Guides worth checking
These pages cover the details that usually decide whether the calculator output is safe to order against.
Guide
Gutter Length Calculator
Work out how much Gutter you need from total run length, stock size, and a practical cut allowance.
Guide
Gutter Guard Length Calculator
Work out how much Gutter Guard you need from total run length, stock size, and a practical cut allowance.
Guide
Fascia Length Calculator
Work out how much Fascia you need from total run length, stock size, and a practical cut allowance.
Guide
Soffit Length Calculator
Work out how much Soffit you need from total run length, stock size, and a practical cut allowance.
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Practical answers
Short answers for the decisions that usually come up before ordering materials or sending a quote request.
Should gutter and fascia be estimated together?
They should be planned together but calculated separately because stock lengths and accessories differ.
What should I count before ordering roofline materials?
Measure runs, corners, outlets, downpipe drops, board lengths, and fixing accessories.
What roofline item is easiest to undercount?
Accessories. Clips, unions, outlets, brackets, bends, and stop ends often add more cost than the straight run suggests.