Baseboard Calculator
Linear feet of trim for a room.
Enter your values
Enter the room length in ft.
Enter the room width in ft.
Enter the number of doorways you are working with.
Enter the door width in ft.
Enter the price per foot in $.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Baseboard needed
- 55 linear ft
- Room perimeter
- 56 ft
- After door openings
- 50 ft
- 8 ft lengths to buy
- 7
- Estimated cost
- $192.50
Quick answer
Baseboard needed is the room perimeter minus door openings, plus about 10% for cuts and waste.
At a glance
| What it does | Linear feet of trim for a room. |
|---|---|
| Category | Home & DIY |
| Inputs needed | Room length, Room width, Number of doorways, Door width, Price per foot |
| Main output | Baseboard needed |
| Cost | Free — no sign-up, no download |
How to use the Baseboard Calculator
- 1Measure the room length and width.
- 2Count doorways and their width.
- 3Order 10% extra for mitre cuts.
Inputs explained
- Room length(ft)
- Enter the room length in ft.
- Room width(ft)
- Enter the room width in ft.
- Number of doorways
- Enter the number of doorways you are working with.
- Door width(ft)
- Enter the door width in ft.
- Price per foot($)
- Enter the price per foot in $.
Worked example
Using the values the calculator loads with:
Inputs
- Room length16 ft
- Room width12 ft
- Number of doorways2
- Door width3 ft
- Price per foot3.50 $
Results
- Baseboard needed55 linear ft
- Room perimeter56 ft
- After door openings50 ft
- 8 ft lengths to buy7
- Estimated cost$192.50
Frequently asked questions
Do I trim behind cabinets?
No — subtract cabinet runs from the perimeter.
What about outside corners?
Add an extra foot per outside corner for mitre waste.
What do I need to enter into the Baseboard Calculator?
Just 5 values: room length, room width, number of doorways, door width, price per foot. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Baseboard Calculator work out the answer?
Baseboard needed is the room perimeter minus door openings, plus about 10% for cuts and waste. The working is shown step by step so you can verify the result by hand.
Is the Baseboard Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.