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Plan your systems

Online Tools

Practical estimates for recording storage, drive arrays and camera coverage.

Video storage calculator

Estimate storage from your camera settings. All cameras are assumed to use the same recording profile.

Select Calculate to see your estimate.

Planning estimate, not a camera-specific prediction. At 1080p / 30 fps / Medium, this tool assumes 40 Mbps for MJPEG, 3 Mbps for H.264 and 2.5 Mbps for H.265. It scales linearly with pixel count and frame rate; Low uses 0.65× and High 1.5×. These are illustrative assumptions, not manufacturer ratings. Actual bitrate varies with scene motion, lighting and encoder settings. Use measured bitrate or manufacturer sizing for final design. Decimal TB; allowance is added to recording storage. Audio, metadata, RAID and filesystem reservations are excluded. About bitrate variability (Axis).

RAID capacity calculator

Estimate a traditional array using equal-capacity drives. For mixed drives, enter the smallest drive capacity.

Select Calculate to see your estimate.

Hot spares are excluded from usable capacity. Estimates exclude formatting, controller and system reservations. RAID 10 requires an even active drive count. RAID is not a backup. RAID reference: Synology.

Fixed-camera field-of-view calculator

Enter the active sensor dimensions from the camera datasheet, rather than its nominal optical-format size.

Select Calculate to see your estimate.

Rectilinear pinhole estimate: angle = 2 × atan(sensor width ÷ (2 × focal length)); scene width = distance × sensor width ÷ focal length. Assumes a target plane perpendicular to the optical axis. Lens distortion, digital cropping and installation angle affect actual coverage; pixel density alone does not guarantee identification. Lens reference: Axis.

AC voltage drop & energy losses calculator

Single-phase uses the outgoing and return conductors. Three-phase assumes balanced current and identical conductors, with voltage drop reported line-to-line. Enter line-to-line supply voltage for three-phase. Assumes lagging power factor. Enter current to calculate real power, or real power to calculate current; both appear in the results.

Reactance per conductor0.00008 Ω/mFixed planning assumption
Select Calculate to see your estimate.
Calculation method & assumptions

Single-phase ΔV = 2I(R cosφ + X sinφ); balanced three-phase ΔV = √3 I(R cosφ + X sinφ). Loss = 2I²R or 3I²R respectively. Here R = ρL/S for one conductor; X = 0.00008 Ω/m × L. This tool fixes reactance for planning; actual cable reactance is not universal and depends on cable construction and installation. Drop percentage uses the entered system voltage.

ρ(T) = ρ20[1 + α(T − 20)]. Copper: ρ20 = 0.017 Ω·mm²/m, α = 0.00393/°C. Aluminium: ρ20 = 0.0265 Ω·mm²/m, α = 0.00403/°C. Temperature means conductor temperature, not ambient temperature. Constants are approximate and may differ from manufacturer tables.

Estimates assume steady current and uniform temperature. They exclude connectors, harmonics, skin/proximity effects and AC neutral imbalance. This does not check ampacity, protective devices or compliance with installation rules.

Voltage-drop reference

DC voltage drop & energy losses calculator

Two-wire DC circuit: the calculation includes the outgoing and return conductors. For a PV string, use its operating voltage and current.

Select Calculate to see your estimate.
Calculation method & assumptions

ΔV = 2IR; resistive power loss = 2I²R. Power-loss percentage equals voltage-drop percentage for this constant-current model. Here R = ρL/S for one conductor; X = 0.00008 Ω/m × L. This tool fixes reactance for planning; actual cable reactance is not universal and depends on cable construction and installation. Drop percentage uses the entered system voltage.

ρ(T) = ρ20[1 + α(T − 20)]. Copper: ρ20 = 0.017 Ω·mm²/m, α = 0.00393/°C. Aluminium: ρ20 = 0.0265 Ω·mm²/m, α = 0.00403/°C. Temperature means conductor temperature, not ambient temperature. Constants are approximate and may differ from manufacturer tables.

Estimates assume steady current and uniform temperature. They exclude connectors, harmonics, skin/proximity effects and AC neutral imbalance. This does not check ampacity, protective devices or compliance with installation rules.

Voltage-drop reference

AC voltage drop — lighting poles

Single-ended three-phase, four-wire feeder with a shared neutral. Identical pole loads repeat L1 → L2 → L3. Pole 1 is one spacing interval from the source; 20 m spacing places poles at 20 m, 40 m, 60 m and so on.

Reactance per conductor0.00008 Ω/mFixed planning assumption
Select Calculate all poles to see results.
Calculation method & assumptions

Uses a segment-by-segment, fundamental-frequency phasor model. Each pole draws I = P / (V source × PF), held constant at its nominal value. Segment phase currents are the sum of downstream loads on that phase. Neutral current is the vector sum of the three phase currents. Phase-conductor drops and neutral displacement are accumulated to calculate each pole’s line-to-neutral voltage.

All lights operate simultaneously with identical power and lagging power factor. Enter the combined lamp/driver input power per pole. Source voltages are balanced, 120° apart. Phase and neutral conductors run continuously along the feeder with uniform cross sections, temperature and material. Separate neutral sizing is supported. The return length is included automatically; do not double the entered spacing.

Resistance per segment = ρ(T) × spacing / conductor area. Copper uses ρ20 = 0.017 Ω·mm²/m and α = 0.00393/°C; aluminium uses 0.0265 and 0.00403. Reactance is fixed at 0.00008 Ω/m per conductor. Negative drop indicates an estimated voltage rise from neutral displacement.

This is a nominal-current planning estimate, not a constant-power LED-driver load-flow solution. Large voltage changes require detailed analysis. Excludes harmonics, earth-return paths, joints, source impedance and internal pole wiring. The comparison limit is your design input, not a compliance verdict. Cable ampacity, neutral harmonic loading and protection must be checked separately.

Voltage-drop background — Electrical Installation Guide

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