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RF Calc JP

RF power, dB, VSWR calculator
Hashimoto Yoshikazu · Utilities
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App info

Developer
Hashimoto Yoshikazu
Category
Utilities, Education
Released
Oct 2, 2026
Version
1.1.2 (Oct 19, 2026)
Price
Free
Size
4.0 MB
Requires
iOS 26.0
Age rating
4+
Languages
English and Japanese

In-app purchases

RF Calc JP Pro (Yearly)$0.99
Current prices, App Store US.
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About RF Calc JP

RF Calc JP is a practical calculator for amateur radio and RF work, for iPhone and iPad. Its signature feature: apply gains and losses (dB) to an absolute power value (W, mW, dBm …) in sequence — follow a signal from the transmitter through cable loss and amplifier gain to the final output, right on the keypad. KEY FEATURE: MIX ABSOLUTE VALUES WITH dB Enter "1 W − 3.8 dB" and it instantly shows 26.2 dBm (= 0.4169 W = 416.9 mW). Working with absolute values (W/dBm) and relative values (dB) in a single line matches how you actually reason about a link. FEATURES • Power / dBm: convert among W / mW / µW / nW / dBm / dBW. Enter one value and see the rest at once (e.g., 1 W = 1000 mW = 30 dBm = 0 dBW). • RF Chain: start from an absolute power, then stack each stage's gain (+dB) or loss (−dB): TX output → cable loss → amplifier gain → final output. See every stage and name each one. • Voltage:…
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