Best Hydrometers for Homebrewing UK 2026
Every homebrewer needs to know the gravity of their wort. Without that number, you are guessing at alcohol content, guessing at fermentation progress and hoping your beer turns out right. A hydrometer gives you the data to brew with confidence, and the good news is that the best ones cost less than a pint at your local.
We compared seven hydrometers and refractometers available on Amazon UK, looking at accuracy, build quality, ease of reading and value for money. Whether you are brewing your first kit beer or dialling in a smash pale ale, here is which measuring tool earns a spot on your brew day bench.
Key Takeaways
- 🏆 Home Brew Hydrometer with Trial Jar is the best all-rounder for beginners: accurate triple-scale readings, includes a 100ml sampling jar, and costs under a tenner.
- 🔬 Brix Refractometer with ATC is the upgrade pick for all-grain brewers who want single-drop readings and automatic temperature compensation.
- 🥇 Stevenson Reeves Triple Scale (S1011) is the premium glass option with calibration checked at the factory for serious accuracy.
- 📏 All hydrometers are fragile glass. Budget for a spare and always use a trial jar wider than the hydrometer diameter.
- 🍺 Measure Original Gravity (OG) before pitching yeast and Final Gravity (FG) when fermentation is complete to calculate your ABV accurately.
Also see: Home Brewing Equipment Guide and Best Homebrew Fermenters.
Quick Picks
Quick Comparison
| Product | Price | Rating | Type | Scales | Best For |
|---|---|---|---|---|---|
| Home Brew Hydrometer + Jar | £9.95 | 4.6/5 | Glass | Triple | Beginners |
| Home Brew Essential | £8.99 | 4.5/5 | Glass | Triple | Budget |
| Stevenson Reeves S1011 | £18.95 | 4.7/5 | Glass | Triple | Accuracy |
| Brewing Mate | £9.99 | 4.5/5 | Glass | Triple | All-rounders |
| TOYZFRIENDY Colour Band | £9.99 | 4.4/5 | Glass | Triple + Colour | Visual readers |
| Brix Refractometer ATC | £15.99 | 4.4/5 | Refractometer | Dual (Brix + SG) | All-grain |
| V-RESOURCING Refractometer | £12.99 | 4.3/5 | Refractometer | Single (Brix) | Sugar testing |
In-Depth Reviews
1. Home Brew Hydrometer with 100ml Trial Sampling Jar
This is the hydrometer that shows up in almost every UK homebrew starter kit, and for good reason. The triple-scale glass stem reads specific gravity (0.990-1.120), potential alcohol (0-12%) and sugar content (0-25%) in one pass. The included 100ml trial jar is just wide enough for the hydrometer to float freely without sticking to the sides, which is the number one cause of inaccurate readings.
At under a tenner with Amazon's Choice badge and nearly 3,000 reviews, this is the default recommendation for anyone starting out. An Amazon reviewer noted that the instructions include the ABV formula, which saves beginners from looking it up separately.
- Includes trial jar
- Triple-scale readings
- Under £10
- Massive review base
- Glass is fragile
- Trial jar is basic plastic
- Scale can be hard to read in poor light
2. Hydrometer for Home Brew Testing
The classic no-frills hydrometer that does one job and does it well. The triple-scale glass stem measures specific gravity, potential alcohol and sugar content. No trial jar included, so you will need to pair it with a graduated cylinder or buy a jar separately. The calibration is factory-set and a reviewer reported consistent readings across multiple batches.
At the lowest price in this comparison, it is a solid choice if you already own a trial jar or are happy buying one separately. The classic tapered design has been the standard in homebrewing for decades.
- Cheapest option
- Triple-scale
- Proven design
- No trial jar included
- Glass is fragile
3. Stevenson Reeves Triple Scale Hydrometer (S1011)
Stevenson Reeves has been making hydrometers for UK brewers since the 1970s. The S1011 is their flagship triple-scale model, measuring specific gravity between 0.990 and 1.120, dissolved sugar in grams per litre, and potential alcohol. Each unit is factory-calibrated, and the printed scale is easier to read than cheaper alternatives thanks to the wider stem and clearer markings.
The premium price reflects better glass quality and tighter calibration tolerances. If you are brewing frequently and want consistent readings across batches, the S1011 is the one to buy. Read the full home brewing equipment guide for more context on where a hydrometer fits in your setup.
- Factory-calibrated
- Clear, easy-to-read scale
- UK manufacturer
- Most expensive option
- No trial jar included
4. Brewing Mate Hydrometer for Home Brewing
Brewing Mate pitches itself as the complete package: a triple-scale glass hydrometer with a 100ml sampling jar included. The calibration is well-balanced according to reviewer feedback, and the included instructions walk you through taking your first gravity reading step by step. An Amazon reviewer noted the hydrometer is well calibrated and balanced to give an accurate reading of specific gravity.
The kit also includes a formula for calculating ABV from your two readings. If you want everything in one box without overthinking it, this is a safe pick.
- Includes jar and instructions
- Well-calibrated
- Good mid-range price
- Glass construction
- Jar is basic plastic
5. TOYZFRIENDY Hydrometer with Colour Bands
The TOYZFRIENDY stands out with graduated colour bands on the stem that make it quicker to read at a glance. Green, yellow and red zones show you roughly where your gravity sits without squinting at tiny numbers. The high borosilicate glass is more thermal-shock resistant than standard soda-lime glass, which matters if you are taking readings in a warm brew room.
An Amazon reviewer noted the colour bands make it faster to check readings mid-brew when your hands are wet and you do not want to hold the jar up to the light. The triple-scale readings are still printed alongside the bands for precise values.
- Colour-coded zones for quick reading
- Borosilicate glass (more durable)
- Triple-scale
- Newer brand, fewer long-term reviews
- No trial jar included
6. Brix Refractometer with ATC
A refractometer is the all-grain brewer's weapon. Instead of filling a jar, you place a single drop of wort on the prism, close the lid and look through the eyepiece. This dual-scale model reads both Brix (0-32%) and specific gravity (1.000-1.130), so you can work in whichever unit your recipe uses. The automatic temperature compensation (ATC) adjusts for wort temperature between 10-30C, which removes the biggest source of reading errors.
The catch: once alcohol is present in fermented beer, the refractometer reading needs a correction formula (tools like Brewfather and BeerSmith handle this automatically). For pre-fermentation gravity checks during the mash or boil, a refractometer is faster and uses less sample than a glass hydrometer. See our best brewing machines guide for all-in-one systems where quick gravity checks matter.
- Single-drop sample
- Dual-scale (Brix + SG)
- Auto temperature compensation
- Needs correction formula post-fermentation
- Less intuitive for beginners
7. V-RESOURCING Brix Refractometer
The budget refractometer option reads Brix (0-32%) only, without the specific gravity scale. If you work exclusively in Brix or just need to check sugar content of your wort, this does the job at the lowest price in the refractometer category. The handheld design is compact and the ATC feature is included.
An Amazon reviewer noted it is less fiddly than an alcometer and more convenient than a conventional hydrometer for quick gravity checks. The single Brix scale means you will need a conversion chart or app to get specific gravity, which adds a small step compared to the dual-scale option above.
- Cheapest refractometer
- ATC included
- Compact design
- Brix only (no SG scale)
- Needs conversion chart
How to Choose the Right Hydrometer
For your first hydrometer, the decision comes down to two questions: how often will you brew, and do you want to measure with a drop or a jar?
Glass triple-scale hydrometers are the standard. They are cheap (under £10), accurate enough for homebrewing, and the three scales (specific gravity, potential alcohol, sugar) cover everything you need. The downside is fragility: glass hydrometers break if you drop them or knock the trial jar. Budget for a spare.
Refractometers are the upgrade path. A single drop of wort is all you need, which means faster readings and less waste. The ATC models adjust for temperature automatically. The trade-off is that refractometers need a correction formula once alcohol is present in your beer, so you still need a hydrometer (or a brewing app) for the final gravity reading.
What about digital hydrometers? They exist, but the reliable models cost £100+ and most UK homebrewers find them overkill. A £10 glass hydrometer gives you the same information if you are willing to take a 30-second reading instead of a 5-second one.
Trial jar width matters. A hydrometer needs room to float without touching the jar walls. If the jar is too narrow, surface tension drags on the stem and your reading is wrong. The ideal trial jar has an internal diameter of at least 35mm. The jars included with the Home Brew Hydrometer and Brewing Mate both fit this requirement.
Frequently Asked Questions
Final Verdict
For most UK homebrewers, the Home Brew Hydrometer with Trial Jar is the right starting point. It costs under a tenner, includes everything you need to take your first gravity reading, and has thousands of positive reviews from UK brewers. If you outgrow it or break it (and you will, eventually), the Stevenson Reeves S1011 is the quality upgrade.
For all-grain brewers who want faster gravity checks during the mash, add the Brix Refractometer with ATC to your toolkit. It complements a glass hydrometer rather than replacing it, because you still need the hydrometer for final gravity readings after fermentation.
Whichever you pick, take your OG and FG readings at the same temperature for the most accurate ABV calculation. A consistent brew day routine beats an expensive instrument every time.
Sarah writes about crafting, DIY and home projects for MakerUK, breaking complex projects into steps anyone can follow.
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Last reviewed: August 17, 2026 · Evidence-based content · Contains affiliate links