| What it does | Pro rata calculator for insurance premiums
| Electronics calculators for makers
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free: $0 forever. Pro Monthly: $4 per month, cancel anytime. Pro Lifetime: $29 one-time payment.
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| Key features | - Calculates earned and unearned premium by policy dates
- Shows daily rate and pro rata factors
- Displays full calculation formula with your numbers
- Handles leap years with actual calendar days
- Two cancellation-date rules: first day not covered or last covered day
- Provides total policy days, earned days, and unearned days
- Estimates straight-line pro rata return premium
- Calculations run locally in your browser
| - Resistor Color Code: read 4, 5 and 6-band resistors or find bands for a value
- LED Resistor: pick the current-limiting resistor and power rating
- Voltage Divider: output voltage, loading effect, or solve R2 for target Vout
- RC Filter: cutoff frequency, time constant and attenuation at any frequency
- LC Resonance: resonant frequency, characteristic impedance and Q
- 555 Timer: astable frequency/duty cycle and monostable pulse width
- Battery Life: runtime from capacity, active/sleep current and duty cycle
- PCB Trace Width: IPC-2221 trace width for current and temperature rise
- Electronics Unit Converter: SI prefixes, AWG to mm², mil to mm, dBm to mW, oz copper
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| What makes it different | - Transparent straight-line pro rata calculation without fees, penalties or taxes
- Accounts for leap years and actual calendar days automatically
- Shows the complete formula filled in with your own policy numbers
| - Real E-series resistor values, not ideal numbers
- Engineering notation input and result sharing as links
- No ads, no tracking, no sign-up for free calculators
- Whole-device BOM costing and battery-life summary in Pro
- Works on phone at the bench
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 1 ▲ +1 (up) since last check |
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| Trust Flow (Majestic) | 1 | 0 |
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| Citation Flow (Majestic) | 17 | 0 |
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| Referring domains (Majestic) | 12 | 0 |
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ProRataWise
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