Snap a photo on the job site, calibrate with a credit card or tape measure, and get instant real-world measurements. Built for plumbers, carpenters, electricians, and contractors.
Camera Capture
Multi-Measure
Angle Finder
Area Calculator
Save & Export
1
Snap a Photo
Use your phone camera or upload an existing image from the job site
2
Calibrate
Select a reference object (credit card, coin, ruler) visible in your photo
3
Measure
Tap points to get distances, angles, and areas in real-world units
4
Save & Share
Download the photo with measurements overlaid to share with your team
Take a photo or drop an image
Place a reference object (credit card, coin, tape measure) next to the item you want to measure
Webcam Capture
Starting camera...
Could not access webcam
Please allow camera permission or use "Upload Image" instead
Reference:or enter:Calibrated
Draw a line on your reference object (Ruler mode), then click "Calibrate"
Click two points to measure distance
Result:- px--
Saved Measurements
Quick Trade Converter
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Trade Quick Reference
Nominal Size
OD (inches)
OD (mm)
ID (inches)
Common Use
1/2"
0.840
21.3
0.622
Supply lines, fixtures
3/4"
1.050
26.7
0.824
Main supply lines
1"
1.315
33.4
1.049
Main supply, irrigation
1-1/4"
1.660
42.2
1.380
Drain lines
1-1/2"
1.900
48.3
1.610
Sink drains, traps
2"
2.375
60.3
2.067
Shower/tub drains
3"
3.500
88.9
3.068
Toilet drains, vents
4"
4.500
114.3
4.026
Main drain, sewer
Nominal
Actual (inches)
Actual (mm)
Common Use
1 x 2
0.75 x 1.5
19 x 38
Furring strips, shims
1 x 4
0.75 x 3.5
19 x 89
Trim, shelving
1 x 6
0.75 x 5.5
19 x 140
Fence boards, shelves
2 x 4
1.5 x 3.5
38 x 89
Wall studs, framing
2 x 6
1.5 x 5.5
38 x 140
Floor joists, headers
2 x 8
1.5 x 7.25
38 x 184
Floor joists, rafters
2 x 10
1.5 x 9.25
38 x 235
Headers, beams
2 x 12
1.5 x 11.25
38 x 286
Large beams, joists
4 x 4
3.5 x 3.5
89 x 89
Posts, columns
Plywood: 4' x 8' (1220 x 2440 mm) sheets
Item
Size (inches)
Size (mm)
Notes
Single Gang Box
2 x 3 x 2.5
50 x 75 x 64
Standard switch/outlet
Double Gang Box
4 x 3 x 2.5
100 x 75 x 64
Two switches/outlets
4" Square Box
4 x 4 x 1.5
100 x 100 x 38
Junction box
1/2" EMT Conduit
0.706 OD
17.9 OD
Most common residential
3/4" EMT Conduit
0.922 OD
23.4 OD
Larger runs
1" EMT Conduit
1.163 OD
29.5 OD
Service entrance
Outlet Height (std)
12" to center
305 mm
From finished floor
Switch Height (std)
48" to center
1219 mm
From finished floor
Outlet Spacing
Every 12 feet
Every 3.66 m
NEC code minimum
Item
Imperial
Metric
Notes
Standard Door
80" x 36"
2032 x 914 mm
Most common interior
Exterior Door
80" x 36"
2032 x 914 mm
Standard entry
Standard Window
36" x 48"
914 x 1219 mm
Common single-hung
Stud Spacing
16" on center
406 mm OC
Standard framing
Ceiling Height
8 feet
2438 mm
Standard residential
Stair Riser
7" - 7.75"
178 - 197 mm
Code maximum
Stair Tread
10" - 11"
254 - 279 mm
Code minimum
Countertop Height
36"
914 mm
Standard kitchen
Handrail Height
34" - 38"
864 - 965 mm
Code requirement
Drywall Sheet
4' x 8'
1220 x 2440 mm
Standard size
Frequently Asked Questions
Can I measure pipe diameter from a phone photo?
Yes. Place a credit card or coin next to the pipe, take a photo, calibrate using the reference object, then use the ruler tool to measure across the pipe opening. The tool gives you the diameter in both inches and centimeters, and the trade reference table helps identify the standard pipe size.
How accurate is measuring from a phone photo?
With proper calibration using a reference object in the same plane as your target, accuracy is typically within 2-5% for flat surfaces. For best results, hold the phone parallel to the surface and place the reference object at the same distance as the target. Avoid extreme angles.
What reference objects can I use for calibration?
The tool includes pre-loaded dimensions for credit/debit cards (8.56 x 5.398 cm), US quarters (2.426 cm), dollar bills (15.6 x 6.63 cm), Euro 1 coins (2.325 cm), A4 paper (21 x 29.7 cm), and US letter paper (21.6 x 27.9 cm). You can also enter any custom distance if you have a tape measure or ruler visible in the photo.
Can I measure angles for pipe bends or miter cuts?
Yes. Switch to Angle mode and click three points: the two arms of the angle and the vertex (corner point). The tool calculates the angle in degrees and shows the complementary angle, which is useful for miter saw settings and pipe bend calculations.
Does this work without installing an app?
Yes, this is a 100% web-based tool that runs entirely in your browser. No app download, no account, no signup required. Just open the page on your phone, snap a photo, and start measuring. Your photos never leave your device - everything is processed locally.
Can I save and share my measurements?
Yes. Click the Save button to download the image with all your measurement lines, labels, and values drawn on top. You can then send this annotated image to your team, client, or supplier via text, email, or any messaging app.
What is the best way to measure lumber or pipe from a photo?
Place your reference object (credit card is easiest) flat on the same surface as the item. Hold your phone directly above, as parallel to the surface as possible. Take the photo, calibrate, then draw your measurement lines. For round pipes, measure the outer diameter and compare with the trade reference table to find the nominal pipe size.