| Section | Metric | Value | Copy |
|---|---|---|---|
| {{ row.section }} | {{ row.label }} | {{ row.value }} |
Gross calories include resting energy. Active calories subtract the resting 1 MET baseline so you can see the net training effect more clearly.
The bench compares nearby activities and sorts them by the time needed to hit your current target burn, which is often more actionable than comparing hourly rates alone.
| Activity | Family | MET | Band | Gross/hr | Active/hr | Min to {{ format(targetCaloriesSafe, 0) }} kcal | Copy |
|---|---|---|---|---|---|---|---|
| {{ row.label }} | {{ row.familyLabel }} | {{ format(row.met, 1) }} | {{ row.intensity }} | {{ format(row.grossRate, 0) }} | {{ format(row.activeRate, 0) }} | {{ format(row.grossTargetMinutes, 1) }} |
The map keeps duration on one axis and MET intensity on the other so a long easy session does not look the same as a short vigorous one.
Calories burned are a rough way to express how much energy an activity uses over a session. That matters when you want to compare workouts, estimate the size of a training block, or keep a simple activity log that is more concrete than saying a session felt easy or hard. This calculator turns body weight, activity choice, duration, and an optional factor into an estimated session total.
The underlying intensity measure here is MET, short for metabolic equivalent of task. In plain language, MET tells you how demanding an activity is relative to quiet rest. The tool uses a fixed MET for each listed activity, then combines that intensity with your body mass and session length to estimate both calories for the full session and calories per hour.
That makes the page especially useful for comparison rather than precision. You can see how a 30-minute run differs from a 30-minute walk at the same body weight, or how a longer low-intensity session can still produce a larger calorie total than a short high-output one. The summary at the top keeps the answer brief, while the tabs expand it into a timeline, cross-activity comparison, map-style classification, activity list, and JSON view.
The calculator also handles the small practical details that make repeated use easier. Switching between kilograms and pounds converts the value already entered instead of forcing you to retype it. The same is true for minutes and hours. The advanced Calorie factor lets you keep the neutral default of 1.00 or apply the page's alternate multiplier when you want to compare conventions.
None of this makes the result a personal metabolic test. The estimate does not know terrain, intervals, rest breaks, weather, movement efficiency, body composition, or heart-rate response. Use it as a planning and comparison tool, then keep nutrition or coaching decisions grounded in the broader context of the real session.
For a solid first pass, enter your current body weight, pick the activity that best matches the pace you actually expect, and enter a realistic duration. In most cases, choosing the right activity matters more than chasing tiny decimal changes in weight, because the MET value drives the size of the estimate.
The easiest mistake is picking a nearby activity that does not match your actual pace. A brisk walk and an easy run can look similar in everyday speech but produce very different MET values here. The second common mistake is mixing up minutes and hours, which can inflate the timeline and total calories immediately. If the headline number looks implausible, check activity choice and duration unit before changing anything else.
The core calculation is linear. Weight is converted to kilograms, duration is converted to hours, and the selected activity contributes a single representative MET value. The hourly burn rate is the product of MET, body mass in kilograms, and the current calorie factor. Total calories are then that hourly rate multiplied by session length in hours.
Because the page uses one MET per activity, it is modeling a steady representative intensity rather than minute-by-minute variation. That is a good fit for comparison, planning, and rough logging. It is a poor fit for sessions with big pace swings, long rests, interval structures, or mixed activities, because the estimate has no place to store those changes.
The tab views are built from the same underlying numbers. Calorie Timeline turns the session into cumulative points over minutes. Activity Comparison recalculates calories per hour for every listed activity using your current weight and factor. Calorie Burn Map places the current session on a chart of duration in minutes against calories per hour, then assigns tool-specific duration and output bands so you can classify the session visually.
| Symbol | Meaning in this tool | Unit |
|---|---|---|
| M | Representative MET for the chosen activity | dimensionless |
| m | Body mass after any pound-to-kilogram conversion | kg |
| f | Calorie factor from the advanced panel | multiplier |
| t | Session length after any minute-to-hour conversion | hr |
| R | Rate (kcal / hr) shown in the summary | kcal/hr |
| C | Calories (kcal) for the session | kcal |
One package-specific detail worth knowing is how the timeline is sampled. For shorter sessions, the page effectively plots every minute. For longer sessions, it increases the plotting step so the chart remains readable and exportable instead of generating an excessive number of points. The last minute is still added if needed, so the final plotted calorie total matches the session calculation.
| Map label | Rule used by this tool | Where it appears |
|---|---|---|
| Light output | Below 400 kcal/hr | Calorie Burn Map |
| Moderate output | 400 to 699.9 kcal/hr | Calorie Burn Map |
| High output | 700 kcal/hr or above | Calorie Burn Map |
| Short | Below 30 minutes | Calorie Burn Map |
| Standard | 30 to 59.9 minutes | Calorie Burn Map |
| Long | 60 minutes or more | Calorie Burn Map |
The fastest way to a usable result is to build one complete session, then branch into the comparison tabs only after the main number looks plausible.
If the warning Enter a positive weight and duration to compute calories. returns, fix those basic inputs before trusting any chart or export.
The two outputs that matter most are Calories (kcal) and Rate (kcal / hr). The total tells you what the full session costs in energy terms. The hourly rate tells you how demanding the chosen activity is at your current body weight and factor, which is why it is the better number for comparing activities.
The main false-confidence trap is reading a single-session estimate as a personal calorie truth. If your real workout included hills, recovery intervals, equipment load, or a pace far from the listed activity, the cleanest check is to compare a few nearby activities and keep the result as a range rather than one definitive number.
A 70 kg person selects Running – 8 km/h for 30 minutes with the neutral factor of 1.00. The calculator shows about 581.0 in Rate (kcal / hr) and 290.5 in Calories (kcal). On Calorie Burn Map, that lands in Moderate output and Standard. The interpretation is straightforward: the session is moderately demanding by the tool's hourly scale and long enough to produce a meaningful but not extreme total.
An 82 kg person chooses Hiking for 90 minutes at factor 1.00. The page reports about 492.0 in Rate (kcal / hr) and 738.0 in Calories (kcal). The map classifies it as Moderate output and Long. This is a good reminder that a long moderate session can outgrow a shorter higher-intensity session in total calories even when the per-hour rate is not extreme.
Enter 70 kg, choose Running – 8 km/h, and leave Duration at 0 minutes. The warning Enter a positive weight and duration to compute calories. stays visible, Estimated Calories Burned does not appear, and the charts remain unavailable. Change Duration to 30 minutes and the session immediately fills Calories (kcal) with 290.5 and Rate (kcal / hr) with 581.0.
MET is the activity-intensity value attached to the chosen option in the Activity list. Higher MET values produce higher Rate (kcal / hr) and therefore higher session totals, all else being equal.
Because the page multiplies activity MET by body mass. At the same MET and duration, a higher entered weight produces a higher calorie estimate.
Those labels come from the tool's internal thresholds on Calories per hour (kcal/hr). They are visual comparison bands for this chart, not medical categories.
It is a multiplier applied to both Rate (kcal / hr) and Calories (kcal). Leave it at 1.00 for the neutral default, or use a different positive factor only when you intentionally want that alternate convention.
The calculator works from the values shown on the page and offers local table, chart, and JSON exports from that result. There is no separate session-processing step behind the estimate used in this tool.
The warning remains until both Weight and Duration are positive. Check that you entered a number greater than zero and that the selected unit matches what you intended.