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Viewport Width Calculator
Convert viewport width units (vw) to pixels and back for responsive design.
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Compare Your Options And Get Clear Answers
Convert viewport width units (vw) to pixels and back for responsive design.
Viewport Width Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: px = viewport width / 100 x vw; vw = px / viewport width x 100.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Viewport Quick Guide
Typical values for reference.
| Viewport | Size | Spare | Pixels |
|---|---|---|---|
| 375 px | 5 vw | – | 18.8 px |
| 768 px | 5 vw | – | 38.4 px |
| 1280 px | 5 vw | – | 64.0 px |
| 1920 px | 5 vw | – | 96.0 px |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Viewport Width Calculator FAQ
Answers to common questions about this calculator.
One percent of the viewport width.
Multiply the viewport width by vw divided by 100.
For fluid typography and layouts.
One percent of the viewport height.