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Convert between kilometers and feet with this km to feet conversion tool.
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This free pressure conversion tool converts atmospheric pressure units such as atm, technical atmosphere, bar, kPa, mmHg, and more in one interface. You can enter a value once and see many equivalent units at the same time. It is web-based and accessible without a mandatory subscription.
OT Dude provides a free Berg Balance Scale calculator page specifically for OT/PT-style balance scoring workflows. It is focused on clinical usability for quickly totaling BBS performance and supporting fall-risk assessment. The calculator content is publicly accessible without requiring a paid subscription.
BikeCalc provides a dedicated cadence calculator/table where you set chainring, sprocket, tire thickness, rim diameter, and speed to analyze cadence outcomes. The page includes step-by-step instructions and interactive parameter controls. It is available on the web with a free access option.
The attenuation calculator is labeled for measuring decibel changes in voltage and includes input/output voltage fields. It also shows the voltage-based attenuation formula using 20·log10(Vin/Vout). ([quickminitools.com](https://quickminitools.com/physics/attenuation-calculator))
This battery charging calculator estimates charge current, C-rate, charging time, and energy using battery capacity, voltage, chemistry, and SoC targets. It is oriented toward practical IEC/IEEE-style engineering estimates and includes taper/efficiency options. The tool is freely accessible without mandatory paid access.
QxMD includes a BASDAI calculator that asks the canonical six BASDAI disease activity questions and computes the standardized score. The page includes formula context and references for clinical use. QxMD’s calculator access is generally offered free to users on web/app, without a mandatory paid subscription for this tool.