ISWIMBAND
Swim faster and safer — free calculators for swim pace, SWOLF efficiency, lap distance, calorie burn, and interval sets, plus pool-to-yard conversions and plain-English guides to stroke technique, training, wearables, and water safety.
From reading a pace off the clock and scoring your stroke efficiency to counting laps, estimating calories, and building an interval set, iSwimband pairs free hands-on calculators with plain-English guides and an illustrated museum of swimming. Get the numbers behind your training right before you push off the wall.
Swim Training Calculators
Free tools for the numbers behind swimming — pace and SWOLF efficiency, lap distance, calorie burn, interval sets, and yard-to-meter course conversion.
Swim Pace Calculator
Turn a swim time and distance into pace per 100 m, per 100 yd, and per 50 m, plus your speed — and convert a pace between metres and yards
SWOLF Score Calculator
Add strokes and seconds per length into a SWOLF efficiency score, normalised to 25 m so any pool reads on the same scale
Swim Distance & Lap Counter
Convert lengths into total distance in metres and yards for a 25 m, 50 m, or 25 yd pool — or find how many lengths a target takes
Swim Calorie Burn Calculator
Estimate calories burned from stroke, effort, body weight, and time using the standard MET energy model
Swim Interval & Set Builder
Build a set from reps, distance, target pace, and rest — with swim time per rep, total time, and a send-off interval
Yard ↔ Meter Pool Converter
Convert distances and times between short-course yards, short-course meters, and long-course meters with the exact yard factor
Swimming Museum
Step into an illustrated museum of swimming — the four competitive strokes and their forerunners, the champions who rewrote the record books, the great pools and aquatic arenas, and the world of open-water and marathon swimming, each in its own gallery. Get to know the history and heroes behind the sport.
Tour the museum →From the Swim Journal
Fresh guides on stroke technique, training and pacing, swim gear and wearables, and water safety, plus plain-language explainers on the science behind faster, safer swimming.
The Science Behind Swim Injury Prevention: Mastering Technique, Warm-Ups, and Recovery Strategies
The Science Behind Swim Injury Prevention: Mastering Technique, Warm-Ups, and Recovery Strategies In the dynamic world of competitive swimming, where milliseconds can determine victory or defeat, swimmers are often caught between pushing their limits and safeguarding their bodies from injuries. The iswimband community understands that performance gains must never come at the cost of long-term […]
The Ultimate Dive Into Waterproof Headphones: Perfect Sound Underwater and Beyond
The Ultimate Dive Into Waterproof Headphones: Perfect Sound Underwater and Beyond In an era where technology meets adventure, waterproof headphones have become essential gear for swimmers, divers, and fitness enthusiasts who don’t want their music to stop when they get wet. Whether you’re splashing through waves at the beach or training in a pool, these […]
The Evolution and Future of Water Sports Technology: Innovations Shaping Aquatic Adventures
The Evolution and Future of Water Sports Technology: Innovations Shaping Aquatic Adventures In recent years, the world of water sports has undergone a remarkable transformation, driven by rapid technological advancements that are redefining how enthusiasts engage with aquatic activities. From high-performance gear to smart devices integrated seamlessly into traditional equipment, innovation now plays a pivotal […]
The Science and Strategy Behind Effective Swim Training Programs
The Science and Strategy Behind Effective Swim Training Programs In an era where fitness trends come and go, swim training remains a cornerstone of athletic development due to its unique physiological benefits. Unlike land-based exercises, swimming engages nearly every muscle group simultaneously while minimizing joint stress, making it ideal for individuals across various age groups […]
Mastering Swim Technique Improvement for Better Results
The Science of Stroke Refinement: Mastering Efficient Swimming Techniques In an era where swimming performance can make or break competitive success, understanding how to refine your stroke mechanics becomes essential. Whether you’re training for triathlons, aiming for Olympic trials, or simply looking to enhance your recreational experience, mastering efficient swimming techniques offers benefits that extend […]
Swim Endurance Training: Practical Applications and Benefits
The Science Behind Building Unbreakable Swim Endurance: Strategies for Masters Swimmers and Competitive Athletes Alike In the world of competitive swimming, endurance isn’t merely about logging long miles—it’s an intricate dance of physiological adaptation, strategic pacing, and mental fortitude that defines champions at every level. Whether you’re a masters swimmer aiming to shave seconds off […]
Keep Learning
Plain-language explainers on strokes and technique, training and fitness, gear and wearables, and water safety — everything you need to read the numbers behind your swimming with confidence.
Visit the Learn hub →