How to resize image in cm
- Drop your image in, or click to browse and select it.
- Choose cm, mm or inch and type the width and height you need.
- Pick the DPI — 300 for print, 96 for screen — and check the pixel preview.
- Click resize and download your correctly-sized image.
What you can use it for
- Passport and visa photos specified in cm (3.5 × 4.5 cm)
- Government forms that give the size in cm or mm
- Preparing an image for print at a set DPI
- Converting a physical size to exact pixels
Why use FlowVid Tools
- Private by default — we never store your images. They're discarded the moment you're done.
- Completely free with no watermark and no sign-up required.
- Fast — drop your image, get the result in seconds. No queues, no waiting.
Supported formats
This tool accepts JPG, PNG, WebP, HEIC as input and gives you a resized image as output. Files are processed in seconds and never stored — we keep nothing once you have your result.
Why forms ask for cm, not pixels
Indian passport, PAN and exam forms grew out of physical photo prints, so they still quote the size in centimetres — 3.5 × 4.5 cm, 2 × 2.5 cm — even though the upload is digital. To hit that size correctly you need two numbers: the physical size and the DPI. Multiply them and you get pixels, which is what the image actually stores. This tool does that conversion so you don't have to.
If your form also sets a KB limit, resize here first to get the dimensions right, then run the result through an exact-size compressor to meet the file-size cap.