Calculate crew requirements, provisions, sailing speed, journey time, and voyage feasibility for your Norse expedition.
Enter your voyage distance in nautical miles, choose your season and route type, then configure your ship and crew across the three tabs. Hit Plan Voyage to receive a complete expedition report including journey duration, provisions needed, rowing shifts, risk level, and cargo status.
Historical values are pre-loaded for the Drakkar — simply change ship type to auto-fill typical specs for the Snekkja, Knarr, or Busse.
Viking seafaring was one of history's most extraordinary feats of navigation and logistics. A Drakkar carrying 32 men from Norway to Lindisfarne (~750 nautical miles) needed careful provisioning: roughly 25 kg of dried food per man for a 10-day voyage, plus fresh water for multiple days between coastal stops. Get the math wrong and the expedition fails before landfall.
The Norse didn't just rely on wind. Oarsmen could sustain about 3–4 knots for hours, while a fair wind pushed the sail to 8–10 knots. Understanding this dual-propulsion system is key to accurate voyage planning. A coastal journey through the Baltic might take 12 days; the same distance open ocean in autumn could take 20 days with storm delays adding 30–40% to estimated time.
This tool is used by historical reenactors, game designers, novelists, students, and anyone fascinated by Norse exploration — from the famous Vinland route to the Varangian river trade through Russia down to Byzantium.
Speed is determined by a base sailing speed (knots) for each ship type, modified by season and route. Rowing speed is ~60% of sailing speed. Effective daily progress uses a weighted average assuming 8 hrs sailing + 4 hrs rowing per day on open sea, reduced for coastal and river routes:
Daily Distance (nm) = (Sail Speed × 8 + Row Speed × 4) × Efficiency Factor
Journey days = Total Distance ÷ Daily Distance, then +1.5 days per portage stop, plus a season storm-delay multiplier (Summer ×1.0, Spring ×1.1, Autumn ×1.25, Winter ×1.6). Provisions are Crew × Rations/Day × Journey Days × 1.15 safety buffer. Cargo load is checked against capacity — overloaded ships reduce speed by 15%.
Under ideal sail conditions (beam reach, good wind), a Drakkar could achieve 10–12 knots. Typical sustained voyage speeds averaged 4–6 knots over a full day including wind lulls, tacking, and rowing periods. The record crossing from Norway to Iceland (~600 nm) was reportedly done in 3–4 days, implying ~6–8 knots sustained.
A Snekkja (smaller raider) carried 20–40 men. A full Drakkar held 40–80 warriors plus supplies. The massive Busse ships could carry 70–100+ men. The Knarr merchant vessel sacrificed crew space for cargo, typically crewed by 10–20 sailors.
The Norse diet at sea relied on dried, salted, or smoked provisions: dried fish (stockfish), hardtack (flatbread), dried meat, butter preserved in barrels, dried berries, and hazelnuts. Ale was carried but rationed; fresh water was obtained at coastal stops. A warrior needed roughly 700–900g of dry provisions per day.
Absolutely — that's one of the primary use cases. The tool produces historically grounded numbers you can drop directly into a campaign or novel. Adjust the crew, ship type, and season to fit your narrative, and use the provisions table to add authentic detail to your story or game session.