What Is This Tool?
This unit converter allows you to convert thermal power values from calorie (th)/hour, based on the thermochemical calorie, to calorie (IT)/second, based on the International Table calorie, facilitating comparisons and calculations involving different heat energy units over time.
How to Use This Tool?
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Enter the value in calorie (th)/hour to convert.
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Select the from-unit as calorie (th)/hour [cal (th)/h].
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Choose the to-unit as calorie (IT)/second [cal/s].
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Click the convert button to obtain the result in calorie (IT)/second.
Key Features
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Converts thermal power between calorie (th)/hour and calorie (IT)/second units.
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Handles conversion between different calorie definitions and time bases.
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Useful for laboratory calorimetry, physiological studies, and thermal engineering.
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Provides a browser-based, user-friendly interface for quick calculations.
Examples
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Convert 10 calorie (th)/hour: 10 × 0.000277592 = 0.00277592 calorie (IT)/second.
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Convert 100 calorie (th)/hour: 100 × 0.000277592 = 0.0277592 calorie (IT)/second.
Common Use Cases
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Reporting small heat-transfer rates in laboratory calorimetry using different calorie units.
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Expressing metabolic heat production rates measured in calories per hour or second.
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Translating historical thermal power measurements for engineering or scientific analysis.
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Analyzing heating and cooling capacities in older systems with calorie-based units.
Tips & Best Practices
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Ensure you select the correct calorie definition for your data set before conversion.
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Be mindful of time unit differences when interpreting results.
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Avoid excessive rounding to maintain conversion accuracy given small numerical factors.
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Use this tool to compare or report data consistently in desired calorie units.
Limitations
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Conversions approximate due to differences between thermochemical and International Table calorie definitions.
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Small conversion factors may lead to precision loss if values are rounded excessively.
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Time unit differences (hour vs second) significantly affect conversion scale and must be considered.
Frequently Asked Questions
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Why are there different types of calories in power measurement?
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There are distinct calorie definitions—thermochemical and International Table—used in different contexts to quantify heat energy. This tool helps convert power measurements based on these to allow comparison.
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What does converting from calorie (th)/hour to calorie (IT)/second involve?
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It involves translating a rate of heat transfer defined per thermochemical calorie per hour into a rate expressed per International Table calorie per second, accounting for both unit and time differences.
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Can this conversion be used for precise scientific calculations?
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While useful for comparing and reporting heat power, users should be aware of approximate factors and time unit changes that could affect absolute precision.
Key Terminology
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Calorie (th)/hour [cal (th)/h]
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A unit of power measuring heat transfer rate based on thermochemical calorie delivered per hour, used to report small heat-transfer rates.
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Calorie (IT)/second [cal/s]
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A power unit representing the rate of energy transfer of one International Table calorie per second, used in expressing thermal power in certain contexts.
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Thermochemical calorie
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A calorie unit exactly equal to 4.184 joules defining heat energy based on thermochemical conventions.
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International Table calorie
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A historical calorie unit used to express heat energy in technical literature and older systems.