diff --git a/ledger/src/block_cost_limits.rs b/ledger/src/block_cost_limits.rs
index dad5976a51..b4967b8622 100644
--- a/ledger/src/block_cost_limits.rs
+++ b/ledger/src/block_cost_limits.rs
@@ -15,7 +15,7 @@ pub const fn max_instructions_per_block() -> u64 {
 }
 
 pub const fn block_cost_max() -> u64 {
-    MAX_INSTRUCTION_COST * max_instructions_per_block()
+    MAX_INSTRUCTION_COST * max_instructions_per_block() * 10
 }
 
 pub const fn account_cost_max() -> u64 {
@@ -23,7 +23,7 @@ pub const fn account_cost_max() -> u64 {
 }
 
 pub const fn compute_unit_to_us_ratio() -> u64 {
-    block_cost_max() / MAX_BLOCK_TIME_US
+    (MAX_INSTRUCTION_COST / AVG_INSTRUCTION_TIME_US) * SYSTEM_PARALLELISM
 }
 
 pub const fn signature_cost() -> u64 {