# ArenaCalc (arenacalc.com)

> Sports Probability, Running Pace, Cycling FTP & Strength Calculators — Accurate calculators for marathon splits, Zone 2 heart rate, cycling Watts/kg, powerlifting 1RM & DOTS scores, nutrition macros, and fair-odds probability.

- Publisher: ArenaCalc Sports Science & Analytics
- Canonical Domain: https://arenacalc.com
- Editorial Policy & Formula Verification: https://arenacalc.com/editorial-policy
- 2026 Reference Benchmarks: https://arenacalc.com/benchmarks
- Full Technical Specification for AI Agents: https://arenacalc.com/llms-full.txt

## Sports Odds, Running, Cycling & Strength Calculators (https://arenacalc.com/category/sports)

- [Sports Betting Odds Converter (American, Decimal & Implied Probability)](https://arenacalc.com/tools/american-decimal-odds-calculator): Convert American moneyline odds (-110, +150) and Decimal odds into exact net profit payout, total return, and implied win %. | Formula: `Total Payout = Stake × DecimalOdds; Implied Probability = (1 / DecimalOdds) × 100` | Baseline Output (Net Profit & Total Payout): **$91.00 Profit ($191.00 Total)**
- [No-Vig Fair Odds & Sportsbook Juice / Hold Percentage Calculator](https://arenacalc.com/tools/implied-probability-no-vig-calculator): Calculate bookmaker overround (vig/juice %) and strip the vig to reveal true fair win probabilities for both sides. | Formula: `Book Sum = (1/OddsA) + (1/OddsB); Vig % = Book Sum - 100%; Fair Prob A = ImpA / Book Sum` | Baseline Output (True No-Vig Win Probability (A vs B)): **50.00% vs 50.00%**
- [Parlay / Accumulator Payout & Multi-Leg Odds Calculator](https://arenacalc.com/tools/parlay-payout-odds-calculator): Calculate combined parlay multiplier, total payout, and true parlay hit probability for 2-leg to 10-leg parlays. | Formula: `Combined Decimal Odds = (LegOdds)^Legs; Total Payout = Stake × Combined Odds` | Baseline Output (Total Parlay Payout (4 Legs)): **$665.43 (+$615.43 Profit)**
- [Kelly Criterion Optimal Bet Sizing & +EV Edge Calculator](https://arenacalc.com/tools/kelly-criterion-bankroll-calculator): Calculate your Expected Value (+EV %) and optimal Full, Half, and Quarter Kelly bankroll stake size. | Formula: `Kelly Fraction f* = ((b × p) - q) / b, where b = DecimalOdds - 1, p = WinProb, q = 1 - p` | Baseline Output (Half-Kelly Recommended Stake (Safe Pro)): **$256.52 (5.13% of Bankroll)**
- [Sports Betting Arbitrage (Surebet) & Hedge Profit Calculator](https://arenacalc.com/tools/arbitrage-hedging-bet-calculator): Calculate exact stake splits across two sportsbooks to lock in a guaranteed risk-free arbitrage or live hedge profit. | Formula: `Arb % = (1/Odds1) + (1/Odds2); Stake1 = Total × (1/Odds1) / Arb%; Guaranteed Return = Stake1 × Odds1` | Baseline Output (Guaranteed Risk-Free Profit): **+$37.35 (3.73% ROI)**
- [VO2 Max Calculator (12-Minute Cooper Run & Race Predictor)](https://arenacalc.com/tools/vo2-max-cooper-test-calculator): Estimate your aerobic VO2 Max (mL/kg/min) from your 12-minute Cooper run distance or resting heart rate. | Formula: `VO2 Max (mL/kg/min) = (Distance_Meters - 504.9) / 44.73` | Baseline Output (Estimated VO2 Max Score): **51.3 mL/kg/min**
- [Cycling FTP (Functional Threshold Power) & Watts/kg Calculator](https://arenacalc.com/tools/cycling-watts-per-kg-ftp-calculator): Calculate your Functional Threshold Power (FTP = 95% of 20-min power), power-to-weight ratio (W/kg), and Coggan zones. | Formula: `FTP = 20-Min Avg Watts × 0.95; Power-to-Weight Ratio = FTP / Weight (kg)` | Baseline Output (FTP & Power-to-Weight Ratio): **252W FTP (3.40 W/kg)**
- [Zone 2 Heart Rate & Karvonen Aerobic Training Zones Calculator](https://arenacalc.com/tools/heart-rate-training-zones-calculator): Calculate your exact Zone 2 fat-burning aerobic heart rate and Max HR using the Karvonen Heart Rate Reserve (HRR) formula. | Formula: `Max HR = 208 - (0.7 × Age); HR Reserve = MaxHR - RestHR; Zone Target = RestHR + HRR × Zone%` | Baseline Output (Zone 2 Aerobic Endurance Range (60-70% HRR)): **134 – 147 BPM**
- [Powerlifting DOTS & Total Relative Strength Score Calculator](https://arenacalc.com/tools/wilks-dots-powerlifting-calculator): Calculate your combined Squat + Bench + Deadlift powerlifting total, pound-for-pound ratio, and DOTS strength score. | Formula: `Total = Squat + Bench + Deadlift; 1,000-lb Club Progress = Total / 1,000` | Baseline Output (Powerlifting Total & DOTS Score): **1,065 lbs (328.1 DOTS)**
- [Barbell Plate Calculator (45-lb Olympic Bar Weight Per Side)](https://arenacalc.com/tools/barbell-plate-loading-calculator): Instantly see which 45, 35, 25, 10, 5, and 2.5 lb plates to load on each side of a standard 45-lb Olympic barbell. | Formula: `Weight Per Side = (Target Total Weight - Barbell Weight) / 2` | Baseline Output (Load on EACH Side of the Bar): **2×45lb**
- [Pickleball DUPR & Tennis Skill Rating Win-Loss Calculator](https://arenacalc.com/tools/pickleball-dupr-win-rate-calculator): Calculate expected point margin and DUPR skill rating movement based on your rating vs opponent team average rating. | Formula: `Expected Win % = 1 / (1 + 10^((OppDUPR - MyDUPR) × 2)); Rating Delta ∝ (Actual - Expected)` | Baseline Output (Estimated New DUPR Rating): **3.930 (+0.080)**
- [Golf Handicap Score Differential & Net Course Strokes Calculator](https://arenacalc.com/tools/golf-handicap-differential-calculator): Calculate your World Handicap System (WHS) 18-hole Score Differential and Course Handicap from Slope and Course Rating. | Formula: `Score Differential = (113 / Slope Rating) × (Adjusted Gross Score - Course Rating)` | Baseline Output (WHS Round Score Differential): **11.1 Index Differential**
- [Basketball True Shooting % (TS%) & Effective FG% (eFG%) Calculator](https://arenacalc.com/tools/basketball-true-shooting-efg-calculator): Calculate advanced NBA basketball shooting efficiency: True Shooting Percentage (TS%) and Effective Field Goal % (eFG%). | Formula: `TS% = PTS / [2 × (FGA + 0.44 × FTA)]; eFG% = (FGM + 0.5 × 3PM) / FGA` | Baseline Output (True Shooting Percentage (TS%)): **67.8% TS**
- [Baseball Pitcher ERA, WHIP & Innings Pitched Stat Calculator](https://arenacalc.com/tools/baseball-era-whip-ops-calculator): Calculate Earned Run Average (ERA), Walks + Hits per Inning Pitched (WHIP), and K/9 strikeout rate for baseball/softball. | Formula: `ERA = (Earned Runs × 9) / Innings Pitched; WHIP = (Walks + Hits) / Innings Pitched` | Baseline Output (Earned Run Average (ERA)): **2.91 ERA**
- [Soccer / Football Season Points Pace & Goal Difference Projector](https://arenacalc.com/tools/soccer-expected-goals-win-points-calculator): Project a football club's final 38-match league table points, Points Per Game (PPG), and title/relegation pace. | Formula: `Current Points = (Wins × 3) + Draws; PPG = Points / Played; Projected = PPG × SeasonMatches` | Baseline Output (Projected Full-Season Points): **78 Points (Champions League Top 4 Pace)**
- [Swimming Pace per 100m & Triathlon Open-Water Finish Calculator](https://arenacalc.com/tools/swimming-pace-100m-swolf-calculator): Calculate your swimming CSS pace per 100m and projected finish times for Sprint (750m), Olympic (1500m), and Ironman (3.8km). | Formula: `Pace per 100m (sec) = (Total Minutes × 60) / (Distance_m / 100)` | Baseline Output (Swim Pace per 100 Meters): **1:50 / 100m**
- [Concept2 Indoor Rowing 500m Split to Watts & 2K Erg Calculator](https://arenacalc.com/tools/rowing-500m-split-watts-calculator): Convert your Concept2 rowing machine 500m split time into exact mechanical Watts and projected 2,000m (2K) erg race time. | Formula: `Watts = 2.80 / (SplitSeconds / 500)³; 2,000m Time = SplitSeconds × 4` | Baseline Output (Concept2 Mechanical Power Output): **263 Watts**
- [Vertical Jump Peak Power (Watts) & Dunk Reach Calculator](https://arenacalc.com/tools/vertical-jump-power-watts-calculator): Calculate your explosive lower-body Sayers Peak Power (Watts) and how many inches you need to dunk a basketball on a 10-foot rim. | Formula: `Sayers Peak Watts = 60.7 × Jump(cm) + 45.3 × Mass(kg) - 2055; Dunk Target = 126 Inches` | Baseline Output (Peak Explosive Leg Power (Sayers)): **5,961 Watts**
- [Athlete Daily Protein Intake Calculator for Muscle Gain & Fat Loss](https://arenacalc.com/tools/protein-intake-muscle-gain-calculator): Calculate optimal daily protein intake (1.6g to 2.2g per kg) and per-meal leucine synthesis targets for strength athletes. | Formula: `Daily Protein (g) = Weight (lbs) × GoalFactor; Per Meal = Daily Protein / Meals` | Baseline Output (Optimal Daily Protein Target): **175 Grams / day**
- [Creatine Monohydrate Loading & Daily Maintenance Dosage Calculator](https://arenacalc.com/tools/creatine-loading-maintenance-calculator): Calculate weight-adjusted creatine monohydrate saturation loading dose (0.3g/kg) and daily maintenance dose (0.03g/kg). | Formula: `Loading Dose (5–7 Days) = 0.3g × Weight_kg; Maintenance Dose = max(3g, 0.05g × Weight_kg)` | Baseline Output (Daily Maintenance Creatine Dose): **4.5 Grams / day**

## Health, Home & Everyday Calculators (https://arenacalc.com/category/lifestyle)

- [BMI (Body Mass Index) & Healthy Weight Range Calculator](https://arenacalc.com/tools/bmi-body-mass-calculator): Calculate your Body Mass Index (BMI), BMI Prime ratio, and healthy target weight range for your height. | Formula: `BMI = 703 × Weight(lbs) / Height(in)²; Healthy BMI Range = 18.5 to 24.9` | Baseline Output (Your Body Mass Index (BMI)): **23.7 (Normal Healthy Weight)**
- [TDEE (Total Daily Energy Expenditure) & Calorie Deficit Calculator](https://arenacalc.com/tools/tdee-calorie-calculator): Calculate your Basal Metabolic Rate (BMR), maintenance TDEE calories, and 500-calorie fat loss target. | Formula: `Mifflin-St Jeor BMR = 10×kg + 6.25×cm - 5×age + 5; TDEE = BMR × Activity Factor` | Baseline Output (Daily Maintenance Calories (TDEE)): **2,688 kcal/day**
- [Daily Macro Calculator (Protein, Carbs & Fat Grams)](https://arenacalc.com/tools/macro-nutrient-calculator): Convert your daily calorie target into exact grams of protein (4 kcal/g), carbohydrates (4 kcal/g), and healthy fats (9 kcal/g). | Formula: `Protein (g) = (Calories × P%) / 4; Carbs (g) = (Calories × C%) / 4; Fat (g) = (Calories × F%) / 9` | Baseline Output (Daily Macro Grams Breakdown): **165g Protein • 220g Carbs • 73g Fat**
- [Daily Water Intake & Workout Hydration Calculator (Oz & Liters)](https://arenacalc.com/tools/water-intake-calculator): Calculate optimal daily water intake in fluid ounces, liters, and 8-oz glasses based on body weight and exercise duration. | Formula: `Daily Fluid Oz = (Weight_lbs × 0.67) + (Workout_Minutes / 30 × 12 oz)` | Baseline Output (Recommended Daily Water Intake): **129 oz (3.80 Liters)**
- [One-Rep Max (1RM) Bench Press, Squat & Deadlift Calculator](https://arenacalc.com/tools/one-rep-max-calculator): Calculate your estimated 1-Rep Max (1RM) and training percentages (85%, 75%) using the Epley and Brzycki strength formulas. | Formula: `Epley 1RM = Weight × (1 + Reps / 30); Brzycki 1RM = Weight × (36 / (37 - Reps))` | Baseline Output (Estimated One-Rep Max (1RM)): **258 lbs/kg**
- [Running Pace Calculator (5K, 10K, Half & Full Marathon Time)](https://arenacalc.com/tools/running-pace-calculator): Calculate your running pace per kilometer and per mile, average speed (mph/kmh), and projected race finish times. | Formula: `Pace per km = Total Minutes / Distance_km; Pace per Mile = Pace_km × 1.60934` | Baseline Output (Required Running Pace): **5:12 /km (8:22 /mi)**
- [Intermittent Fasting (16:8, 18:6, 20:4) Eating Window Calculator](https://arenacalc.com/tools/fasting-window-calculator): Calculate your exact daily eating window and fat-burning ketosis milestone hours for 16:8, 18:6, or 20:4 intermittent fasting. | Formula: `Break-Fast Hour = (Last Meal Hour + Fast Hours) mod 24; Eating Window = 24 - Fast Hours` | Baseline Output (Break Your Fast At): **12:00 PM (16:8 Protocol)**
- [90-Minute REM Sleep Cycle & Optimal Bedtime Calculator](https://arenacalc.com/tools/sleep-cycle-calculator): Find the best bedtime to wake up refreshed between 90-minute REM sleep cycles (allowing 15 minutes to fall asleep). | Formula: `Optimal Bedtime = Wake Time - (Cycles × 1.5 Hours) - 0.25 Hours (Fall Asleep)` | Baseline Output (Optimal Bedtime (5 Full Cycles)): **10:45 PM**
- [Concrete Slab Cubic Yards & 80-lb Premix Bags Calculator](https://arenacalc.com/tools/concrete-bags-calculator): Calculate cubic yards of ready-mix concrete and number of 60-lb or 80-lb concrete bags needed for slabs, patios, and driveways. | Formula: `Cubic Feet = Length × Width × (Thickness_in / 12); Cubic Yards = Cubic Feet / 27 (+10% buffer)` | Baseline Output (Concrete Volume (Incl. 10% Waste)): **3.26 Cubic Yards**
- [Wall Paint Gallons & Primer Coverage Calculator](https://arenacalc.com/tools/paint-coverage-calculator): Calculate exact gallons of interior or exterior wall paint needed based on room perimeter, ceiling height, and coats. | Formula: `Paintable Area = (Perimeter × Height - Doors/Windows) × Coats; Gallons = Area / 350 sq ft` | Baseline Output (Paint Needed (2 Coats)): **3 Gallons (2.5 gal exact)**
- [Flooring, Hardwood & Tile Square Footage + Waste Calculator](https://arenacalc.com/tools/flooring-tile-calculator): Calculate total flooring square footage, waste overage (10%), boxes needed, and total material + installation cost. | Formula: `Order Sq Ft = Room Length × Width × (1 + Waste%); Boxes = Order Sq Ft / 20 sq ft per box` | Baseline Output (Total Flooring to Order (With Waste)): **278 Sq Ft**
- [Air Conditioner BTU & Tonnage Room Size Calculator](https://arenacalc.com/tools/ac-btu-room-calculator): Calculate the exact cooling capacity in BTUs/hr and HVAC tons needed for any room or house square footage. | Formula: `Recommended BTU/hr = Area_SqFt × 22 × (CeilingFt / 8) × SunFactor; 1 Ton = 12,000 BTU` | Baseline Output (Recommended Cooling Capacity): **11,500 BTU/hr**
- [Home Solar Panel System Size (kW) & ROI Payback Calculator](https://arenacalc.com/tools/solar-panel-payback-calculator): Calculate required solar system size (kW), number of 400W panels, 30% tax credit savings, and payback period. | Formula: `Monthly kWh = Bill / Rate; System kW = (Daily kWh / SunHours) × 1.20; Net Cost = kW × $2,850 × 0.70` | Baseline Output (Recommended Solar System Size): **10.4 kW (26 × 400W Panels)**
- [Appliance Electricity kWh Usage & Monthly Bill Calculator](https://arenacalc.com/tools/electricity-kwh-cost-calculator): Calculate daily, monthly, and yearly electricity consumption (kWh) and utility bill cost for any home appliance. | Formula: `Monthly kWh = (Watts × Hours/Day × 30) / 1,000; Monthly Cost = Monthly kWh × $/kWh` | Baseline Output (Monthly Appliance Electricity Cost): **$30.60/mo**
- [Road Trip Gas Cost, Gallons Needed & Passenger Split Calculator](https://arenacalc.com/tools/fuel-trip-cost-calculator): Calculate total fuel cost, gallons of gas required, and cost per passenger for any driving trip distance and vehicle MPG. | Formula: `Gallons Needed = Distance / MPG; Total Fuel Cost = Gallons × Gas Price` | Baseline Output (Total Trip Fuel Cost): **$77.33**
- [EV Home Charging Cost vs. Gasoline Annual Savings Calculator](https://arenacalc.com/tools/ev-charging-cost-calculator): Calculate cost to charge an electric vehicle (kWh) and compare annual EV driving cost vs a gas car. | Formula: `EV Annual Cost = (Miles / mi_per_kWh) × $/kWh; Gas Annual Cost = (Miles / MPG) × $/Gal` | Baseline Output (Annual Fuel Savings Driving EV): **$1,109/yr ($5,545 / 5 yrs)**
- [Restaurant Tip & Group Bill Splitter Calculator](https://arenacalc.com/tools/tip-bill-splitter): Calculate tip amount, total restaurant bill with tip, and exact split per person for any group size. | Formula: `Tip = Bill × Tip%; Total = Bill + Tip; Per Person = Total / People` | Baseline Output (Total per Person (4 Way Split)): **$43.50 / person**
- [Chronological Age in Years, Months, Weeks, Days & Hours Calculator](https://arenacalc.com/tools/exact-age-calculator): Convert your age in years and months into total months, weeks, days, hours, minutes, and approximate heartbeats lived. | Formula: `Total Days ≈ (Years × 365.2425) + (Months × 30.437); Total Hours = Days × 24` | Baseline Output (Total Days Lived): **11,079 Days**
- [Final Exam Grade Needed Calculator (Weighted Course Average)](https://arenacalc.com/tools/final-grade-calculator): Calculate the exact score you need on your final exam to achieve your target overall course grade. | Formula: `Required Final Score = (Target Grade - Current Grade × (1 - Weight)) / Weight` | Baseline Output (Score Needed on Final Exam): **102.0%**
- [Dog & Cat Age in Human Years Calculator (Size-Adjusted)](https://arenacalc.com/tools/pet-age-calculator): Convert your dog or cat's age into accurate human years accounting for rapid early maturity and breed weight class. | Formula: `Year 1 = 15 Human Yrs; Year 2 = 24 Human Yrs; Year 3+ = 24 + (Age - 2) × SizeFactor` | Baseline Output (Equivalent Age in Human Years): **39 Human Years**