diff --git a/dapptools/src/seth.rs b/dapptools/src/seth.rs
index e1f1941abae3..11aff3e05ec9 100644
--- a/dapptools/src/seth.rs
+++ b/dapptools/src/seth.rs
@@ -25,6 +25,9 @@ async fn main() -> eyre::Result<()> {
         Subcommands::ToFix { decimals, value } => {
             println!("{}", SimpleSeth::to_fix(unwrap_or_stdin(decimals)?, unwrap_or_stdin(value)?));
         }
+        Subcommands::ToWei { value, unit } => {
+            println!("{}", SimpleSeth::to_wei(unwrap_or_stdin(value)?, unit.unwrap_or(String::from("wei"))));
+        }
         Subcommands::Block {
             rpc_url,
             block,
diff --git a/dapptools/src/seth_opts.rs b/dapptools/src/seth_opts.rs
index 02b447c459f4..d1357292bd40 100644
--- a/dapptools/src/seth_opts.rs
+++ b/dapptools/src/seth_opts.rs
@@ -26,6 +26,9 @@ pub enum Subcommands {
     #[structopt(name = "--to-fix")]
     #[structopt(about = "convert integers into fixed point with specified decimals")]
     ToFix { decimals: Option<u128>, value: Option<u128> },
+    #[structopt(name = "--to-wei")]
+    #[structopt(about = "convert an ETH amount into wei")]
+    ToWei { value: Option<u128>, unit: Option<String> },
     #[structopt(name = "block")]
     #[structopt(
         about = "Prints information about <block>. If <field> is given, print only the value of that field"
diff --git a/seth/src/lib.rs b/seth/src/lib.rs
index 65bf4066a95b..fbe8269baa60 100644
--- a/seth/src/lib.rs
+++ b/seth/src/lib.rs
@@ -202,7 +202,7 @@ where
         field: String
     ) -> Result<U256> {
         let block = block.into();
-        let base_fee_hex = Seth::block(
+        let block_field = Seth::block(
             &self,
             block,
             false,
@@ -211,7 +211,7 @@ where
             false
         ).await?;
         Ok(U256::from_str_radix(
-            strip_0x(&base_fee_hex),
+            strip_0x(&block_field),
             16
         ).expect("Unable to convert hexadecimal to U256"))
     }
@@ -339,6 +339,25 @@ impl SimpleSeth {
         format!("{:#x}", u)
     }
 
+    /// Converts an eth amount into wei
+    ///
+    /// ```
+    /// use seth::SimpleSeth as Seth;
+    ///
+    /// assert_eq!(Seth::to_wei(1, "".to_string()), "1");
+    /// assert_eq!(Seth::to_wei(100, "gwei".to_string()), "100000000000");
+    /// assert_eq!(Seth::to_wei(100, "eth".to_string()), "100000000000000000000");
+    /// assert_eq!(Seth::to_wei(1000, "ether".to_string()), "1000000000000000000000");
+    /// ```
+    pub fn to_wei(value: u128, unit: String) -> String {
+        let value = value.to_string();
+        match &unit[..] {
+            "gwei" => format!("{:0<1$}", value, 9 + value.len()),
+            "eth" | "ether" => format!("{:0<1$}", value, 18 + value.len()),
+            _ => value,
+        }
+    }
+
     /// Converts an Ethereum address to its checksum format
     /// according to [EIP-55](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-55.md)
     ///