1 / 2

12 Rounds Boxing Gym

4.9· 89 reviews on Google1A St John's Hl, Clapham Junction, LondonMore in Clapham Junction More in London

Get the studio's best price

Send an enquiry — 12 Rounds Boxing Gym will reply with prices and available times.

Costs nothing · sent straight to the studio

Category: Boxing, Fitness Studio
Location: Clapham Junction, London
Rating: 4.9 / 5 (89 reviews on Google)

12 Rounds Boxing is a fun, vibrant and inclusive boxing gym based in Clapham Junction, London. The gym offers conditioning boxing fitness classes, technical boxing classes, kids boxing, personal training, and a white-collar fight pathway. Women-only classes and Box & Balance workshops are also available.

The gym was founded by Kat, who started boxing at 32 and competing at 36, embodying the ethos that boxing is for everyone regardless of age or ability.

Opening hours

Mon–Thu: 07:00-21:00
Fri: 07:00-20:00
Sat: 08:00-13:00
Sun: 10:00-13:00

Classes

Kids BoxingPersonal TrainingBox and Balance

Website

Reviews on Studiomaps

No reviews yet — trained here? Be the first to tell others about it.

Trained here? Leave your rating

Frequently asked questions about 12 Rounds Boxing Gym

How much does it cost to train at 12 Rounds Boxing Gym?

12 Rounds Boxing Gym does not list fixed prices here, but it has an intro offer: Sign up for an intro session via the booking link.

What are the opening hours at 12 Rounds Boxing Gym?

12 Rounds Boxing Gym is open Mon–Thu 07:00-21:00, Fri 07:00-20:00, Sat 08:00-13:00, Sun 10:00-13:00.

Where is 12 Rounds Boxing Gym?

12 Rounds Boxing Gym is at 1A St John's Hl in Clapham Junction, London.

What kind of training does 12 Rounds Boxing Gym offer?

At 12 Rounds Boxing Gym you will find boxing and fitness studio.

What rating does 12 Rounds Boxing Gym have?

12 Rounds Boxing Gym has 4.9 out of 5 on Google based on 89 reviews.

Similar gyms & studios

Mind over matter boxing

5.0(375)

Boxing · London

Your first class is free — book a free trial today.

Paragon Gym

5.0(207)

Boxing · London

Crouch End Fitness Centre

5.0(142)

Boxing · London

Beginner Boxing Programme — 1 month unlimited Fundamentals & Perform classes + gloves + wraps (new customers only)

Relentless Boxing London

5.0(138)

Boxing · London

Unlimited 2-week introductory trial for just £25

Sweeney's Boxing

5.0(138)

Boxing · London

£70 · 2-week unlimited trial including all classes, open gym access, and towel service

Fight City Gym - Balham

5.0(132)

Boxing · London

More categories in London

Yoga (876)Pilates (669)PT Studio (471)Wellness (471)Dance (418)Martial Arts (401)Reformer Pilates (372)Functional Training (270)

Areas in London

Wandsworth (136)Fulham (58)Southwark (57)Islington (55)Hackney (52)Kingston Upon Thames (49)Lambeth (47)Croydon (44)

Guides to help you choose

All guides

Boxing vs kickboxing: which should you take up?

Two very different training cultures behind two similar-looking classes. What each session involves, how progression works, what it costs, and how to pick.

The best boxing gyms and studios in London 2026

Nine London boxing gyms with real coaching, real ratings and an open door for beginners — picked from 111 rated boxing listings across the capital.

Hot yoga — how it actually works

What happens in a hot yoga class, why the heat, and what to expect the first time you try it in London.