Specific converters for real-world jobs.
No bloated calculators, no sign-up. Built for cooks, producers, freelancers, makers, gamers and gym-goers.
- Instant
- Private
- Free
1 US cup of sifted all-purpose flour.
- Volume
- 240 ml
- Density
- 0.52 g/ml
- In ounces
- 4.41 oz
- Tablespoons
- 16
Instant
Everything runs in your browser. Zero waiting, works offline once loaded.
Private
Your numbers never leave your device. No tracking of what you convert.
Specific
Presets, real-world units and explanations — not just dropdowns.
Free
No paywalls, no sign-ups, no upsells. Ever.
Popular right now
All tools →Cups to Grams Converter (100+ Ingredients)
Convert cups, tablespoons and teaspoons to grams for over 100 specific baking and cooking ingredients.
Try nowBPM to Milliseconds Delay Calculator
Convert BPM to milliseconds, Hz and seconds for every note value — 1/1 down to 1/64 triplets and dotted notes.
Try nowOne Rep Max (1RM) Calculator + % Chart
Estimate your 1RM with 5 formulas (Epley, Brzycki, Lombardi, O'Conner, Wathan) and a full %1RM training chart.
Try nowColor Converter — HEX, RGB, HSL, OKLCH & Contrast
Convert any color between HEX, RGB, HSL, HWB, OKLCH and LCH, with WCAG contrast checking against any background.
Try nowCron Expression Builder & Translator
Build cron expressions visually and translate any cron string to plain English with the next 5 fire times.
Try nowSous Vide Time & Temperature Calculator
Recommended sous vide temperature and time by protein, thickness and doneness, with pasteurisation safety.
Try nowAlso popular
- 🎮Gaming & Streaming
Mouse Sensitivity Converter (Valorant, CS2, Apex, Fortnite)
Convert mouse sensitivity between games at matched DPI — Valorant, CS2, Apex, Overwatch, Fortnite, Rainbow Six.
- 🔨Construction & DIY
Concrete Volume & Bags Calculator
Cubic yards / metres of concrete needed for slabs, footings, columns and posts, plus bags-of-mix conversion.
- 🖨️3D Printing
3D Filament Length, Weight & Cost Calculator
Convert between filament length, weight and cost for PLA, PETG, ABS, TPU and more at 1.75mm, 2.85mm or 3.00mm.
- 🍺Home Brewing
ABV Calculator (OG → FG + Refractometer)
Calculate beer ABV from original and final gravity, with refractometer correction and attenuation %.
- ⚙️Developer Tools
Unix Timestamp Converter (with Timezone)
Bidirectional Unix timestamp ↔ human date converter with timezones, milliseconds and ISO 8601.
- 🎨Design & Creative
Aspect Ratio Resizer (Image, Video, Social)
Resize any dimensions while keeping aspect ratio, with presets for Instagram, TikTok, YouTube and cinema formats.
What Redmoon Converters is
Most everyday conversions are not one number. A cup of flour weighs 125 grams if it was spooned into the cup and closer to 150 if it was scooped; a delay time depends on the note value as well as the tempo; a concrete order depends on the bag size you can actually buy. General-purpose unit converters flatten all of that into a single dropdown. The 94 tools here go the other way: each one is built for a single job, carries the presets and units that job really uses, and explains the formula underneath the result so you can see why the answer is what it is.
The site is written and maintained by Paul Clark of Redmoon Software, an independent studio. The write-up on every tool page is drawn from the tool's own code rather than its name, tools that rest on a published standard or a rate that changes cite the source, and the whole set was last checked against what the components compute on August 26, 2026. Alongside the tools there are 111 worked guides on the blog, each taking one conversion through real examples and the mistakes people actually make with it. Everything runs in your browser, nothing you type is sent to us, and every tool is free.
Latest guides
All 111 guides →- 🏔️
Baking at High Altitude: What Changes Above 3,000 Feet and What to Adjust
Thin air makes cakes over-rise and collapse, dries out batters and speeds up yeast. The standard adjustments, a worked cake at 7,000 ft, and what the oven converter can and can't do for you.
- 🌌
Milky Way Exposures by the Numbers: The 500 Rule, the NPF Rule and Where to Focus
How long you can expose the night sky before stars trail, why crop factor and pixel pitch shorten it, how to spend the remaining stops on ISO and aperture, and why hyperfocal focus blurs stars.
- 📈
From One-Rep Max to Training Block: Percentages, RPE and Loads You Can Actually Build
A 1RM estimate is only the start. How to take a safe estimate from a rep set, set four weeks of loads with percentages and RPE, round them to the plates you own, and progress.
- 💾
Sizing a Video Project Before the Shoot: Footage, Proxies, Backups and Upload Time
Turn hours of footage into a drive shopping list: camera originals, sound, proxies, cache, a 3-2-1 backup that doesn't triple everything, and how long the offsite copy really takes to upload.
- 🥐
Cooking an American Recipe in a Metric Kitchen, Start to Finish
Sticks of butter, a packet of yeast, 375°F and a 9×13 pan: one US cinnamon roll recipe taken through grams, yeast swaps, cup sizes, fan ovens and a smaller tin, in the order that works.
- 🔦
Planning for a Power Outage by the Numbers: Watts, Watt-Hours, and Which Backup Fits
List what must keep running, turn it into watts and watt-hours, then size a generator for the surge or a battery for the day. A worked winter-outage plan for one household.
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