What This Cluster Covers
This page brings together allcaltools' conversion and utility tools in one place. At its core are two everyday conversion calculators: a general-purpose Unit Converter spanning length, weight, temperature, area, volume and speed, and a Grams to Cups Converter built specifically for kitchen measurements, where a single gram-to-cup ratio genuinely differs by ingredient. Both calculate instantly in your browser as you type, with no sign-up and no server round-trip.
Alongside the two converters sit two smaller developer-facing utilities that belong in the same "quick, no-account tool" category: a UPI QR Code Generator for turning a UPI ID into a scannable payment QR code, and an Image to WebP Converter for bulk-shrinking images into a faster web format. Both are worth calling out beyond simple convenience, because what you feed into them is genuinely sensitive — a UPI ID is a payment identifier, and the images people convert are often personal photos or unpublished business assets. Both tools run entirely client-side: nothing you type or upload is ever sent to a server. That's the same "everything happens in your browser" principle behind every calculator on allcaltools, but it carries more weight here, where the input itself is something you'd rather not hand to a third party.
Which Calculator Do I Need?
Not sure which of the four fits your situation? If you're converting a physical quantity — length, weight, temperature, area or volume — between metric, imperial or Indian units, the Unit Converter is built for that, with a full conversion table across six categories, including Indian land units like Bigha and Guntha. If instead you're working from a recipe and need to turn a weight in grams into a cup measurement (or the other way around) for flour, sugar, butter, rice or similar ingredients, the Grams to Cups Converter gives you ingredient-specific accuracy that a generic weight-to-volume converter can't, since different ingredients pack differently into a cup.
Outside pure unit conversion, two small utilities round out this cluster. If you need to collect a payment and want a scannable QR code carrying your UPI ID, name and an optional fixed amount, use the UPI QR Code Generator — it builds the code entirely in your browser, so your UPI ID is never sent anywhere. And if you have a batch of JPG, PNG, GIF, BMP or AVIF images you want to shrink into the modern WebP format for a faster website, without uploading them to a third-party server, the Image to WebP Converter processes every file locally in your browser, with no limit on how many you convert.
Unit Converter
Free online unit converter for length, weight/mass, temperature, area (including Bigha and Guntha), volume and speed with a full conversion table.
Grams to Cups Converter
Convert grams to cups and cups to grams for flour, sugar, butter, rice and more. Ingredient-accurate kitchen conversions with US, metric and UK cup sizes.
UPI QR Code Generator
Generate a free UPI payment QR code instantly in your browser using your UPI ID, name and optional amount. No data leaves your device.
Image to WebP Converter
Convert unlimited JPG, PNG, GIF, BMP and AVIF images to WebP in bulk. Free, no file limit, no sign-up — everything runs in your browser and no image ever leaves your device.